What Sizes Can a Custom Mattress Come In?

Sometimes, investing in a custom sized mattress is a necessity. Maybe you have a unique bed frame that’s a family heirloom, need a special mattress for your RV, or simply want a super big bed.

You can get a custom size mattress in really any size or shape you want—just remember, the more outlandish the mattress, the higher the price tag. However, it is easier to describe what you want if you know more about some of the more common custom mattress sizes.

This article goes over a few reasons to get a custom mattress and the most common custom mattress sizes.

Popular Custom Mattress Sizes

The “standard” mattress sizes were not always what they are today—sizes, materials, and mattress thickness have all changed over the years.

This means anyone with an antique bed frame, headboard, or footboard may need to order a custom sized mattress because none of the standard sizes fit. Shoppers also buy custom beds because they want something extra big. In the 1960s and 1970s, colossal custom mattresses like the Texas and Alaskan king became popular.

Custom-sized mattresses are also gaining traction among individuals looking for ergonomic solutions. These specialized options can cater to health needs, such as back support or joint pain relief, through customized dimensions and materials.

King and queen size mattresses didn’t become popular in the US until the 1950s. As the king and queen mattresses became more popular, mattress companies decided to make wider or longer versions of the standard mattress sizes.

This innovation opened the door to the creation of more niche mattress dimensions, providing more options for varying sleep preferences.

Here are some of the most common custom mattresses:

1. Super Single

A super single mattress is 48 inches wide and 84 inches long. Compared to a standard single (or twin), which is 38 inches wide and 75 inches long, the super single is significantly larger.

As far as custom beds go, the super single is a more affordable price because it isn’t substantial. This custom mattress is excellent for single sleepers who are tall and want to be able to spread out.

Its compact dimensions also make it an ideal choice for narrow bedrooms or studio apartments.

2. Olympic Queen

Olympic queen mattresses are 66 inches wide and 80 inches long. They are the same length as a standard queen but with an extra 6 inches of width. This is great for partners who want a little extra room for themselves at night.

Olympic queen mattresses are also a smart choice for those upgrading from a full-size bed without needing to invest in a much larger frame or a bigger room.

3. Texas King

One of the biggest bed sizes is the Texas King. The Texas King is 80 inches wide and 98 inches long. Compared to a standard king mattress, which is 76 inches wide and 80 inches long, the Texas king is massive. Tall couples who want plenty of room are well suited to this mattress size.

The Texas King is also a statement piece for those seeking luxury and opulence in their bedrooms. Its impressive size can transform a room into a lavish retreat.

4. Alaskan King

At 108 inches by 108 inches, the Alaskan king is a staggering 32 inches wider and 28 inches longer than a standard king mattress. Partners who enjoy plenty of room to themselves are a good fit for this type of mattress.

To fit this mattress comfortably, you need a bedroom that is at least 16 feet by 16 feet. Otherwise, your room will feel cramped.

This size is also ideal for families who enjoy co-sleeping or accommodating pets in bed, making it a versatile option for large households.

5. Three-Quarter Mattress

The three-quarter mattress measures 48 inches wide and 75 inches long, falling between a twin and full-size mattress. It is often used for antique bed frames and smaller guest rooms where space is limited. Despite its smaller size, it offers enough sleeping surface for single sleepers who prefer more room than a twin provides.

6. Custom Circular Mattresses

Circular mattresses are a unique and eye-catching option often chosen for aesthetics or unconventional bedroom layouts. Sizes vary but typically range from 84 inches to 96 inches in diameter. These mattresses require specialized bedding and can give a room a luxurious, contemporary vibe.

Custom Mattress Options

Custom mattresses provide unparalleled flexibility, offering solutions tailored to fit specific needs, dimensions, and aesthetics.

1. Tailored Dimensions

Custom mattresses can be designed to fit a wide range of spaces and requirements, ensuring optimal functionality:

• Narrow Spaces: For compact areas like RVs, campers, or small bedrooms, custom mattresses can be made in sizes such as 30 x 75 inches. These slim dimensions maximize space without compromising comfort.
• Oversized Beds: For those seeking a luxurious sleeping experience, oversized custom mattresses, like 100 x 100 inches, provide ample space for couples, families, or anyone desiring extra room to stretch out.
• Shortened Lengths: Perfect for children, custom-made shortened mattresses can fit specific furniture or unconventional bed frames, saving space while meeting functional needs.

2. Unique Shapes

Custom mattresses are not confined to traditional rectangular forms. They can be designed in various shapes to fit unconventional spaces or enhance the aesthetics of a room:

• Circular: A popular choice for round beds, circular mattresses bring a contemporary and luxurious feel to bedrooms with unique design themes.
• Triangular: Ideal for tight corners, boat cabins, or angular spaces, triangular mattresses ensure that no area is wasted while maintaining comfort.
• Cut-Outs and Angles: For irregular spaces like van conversions, boat interiors, or furniture with unique contours, custom mattresses can include cut-outs or angled edges to fit seamlessly.

3. Thickness Variations

Custom mattresses offer a range of thickness options, enabling you to choose what suits your comfort level and spatial constraints:

• Low-Profile Mattresses: Typically less than 8 inches thick, these are ideal for spaces where height is limited, such as bunk beds, lofted beds, or foldaway furniture. They provide functionality without bulk.
• Extra-Thick Mattresses: For a plush, luxurious feel, custom mattresses can be made significantly thicker than the standard 8–14 inches. This is perfect for individuals seeking maximum cushioning or high-end aesthetics in their sleeping arrangement.

Cost Considerations for Custom Mattresses

Custom mattresses are often a more expensive investment compared to standard options due to the tailored craftsmanship, specialized materials, and unique designs they require. Understanding the factors influencing the price can help you plan your budget effectively and make informed decisions.

1. Size and Shape Complexity

The size and shape of a custom mattress significantly impact its cost.

• Oversized Dimensions: Larger mattresses require more material and labor, which directly increases the price. For instance, a custom 100 x 100-inch mattress will cost more than a standard king-size mattress.
• Unique Shapes: Irregular shapes, such as circular, triangular, or mattresses with cut-outs and angled edges, are more labor-intensive to produce. Manufacturers may charge additional fees for the complexity involved in creating these designs.

Tip: Simpler shapes with standard dimensions cost less than highly intricate or unusual configurations.

2. Material Choice and Quality

The materials used in constructing a custom mattress play a crucial role in determining its overall price:

• Foam Options: Memory foam, latex, and high-density polyurethane foam are common choices. Natural latex is more expensive than synthetic alternatives due to its durability and eco-friendliness.
• Spring Systems: Mattresses with pocketed coils or hybrid designs incorporating both foam and springs often cost more than foam-only options.
• Specialty Fabrics: Covers made from organic cotton, bamboo, or Tencel are pricier than standard polyester covers but offer additional benefits like breathability and sustainability.

Tip: Investing in higher-quality materials can increase durability and comfort, offering better long-term value.

3. Additional Features

Enhancements or customizations added to the mattress can further increase costs:

• Organic Fabrics: Mattresses made with certified organic materials are environmentally friendly but tend to be more expensive.
• Cooling Layers: Features like gel-infused foam or phase-change materials designed to regulate temperature can add to the cost.
• Adjustable Designs: Mattresses compatible with adjustable bed bases or with customizable firmness zones involve more advanced engineering, raising the price.
• Hypoallergenic Options: For those with allergies, hypoallergenic materials or dust mite-resistant covers may be an added expense.

Tip: Prioritize features that align with your specific needs to avoid overpaying for unnecessary upgrades.

Other Cost Factors

• Shipping Fees: Custom mattresses, especially oversized or irregularly shaped ones, may incur higher shipping costs due to their size and weight.
• Custom Bedding: Unusual dimensions may require custom sheets, toppers, and protectors, which add to the overall expense.
• Return Policy Limitations: Since custom mattresses are often non-returnable, any errors in size or design could lead to additional costs for adjustments or replacements.

Balancing Cost and Value

While custom mattresses typically come with a higher price tag, their benefits—such as precise fit, enhanced comfort, and tailored features—can justify the investment. To manage costs effectively:

• Set a Budget: Determine your maximum spending limit before exploring options.
• Prioritize Features: Focus on essential customizations that address your needs rather than optional luxuries.
• Shop Around: Compare quotes from multiple manufacturers to ensure competitive pricing without compromising quality.

By understanding the factors affecting cost, you can strike a balance between personalization and affordability, ensuring your custom mattress provides both comfort and value.

Reasons to Get A Custom Mattress

Many people order custom mattresses because they want something longer or broader than a standard size mattress.

Others need a custom mattress because they have unique space to fill. Yet more people need a mattress tailored to their sleep needs.

1. Non-Standard Bed Frames

Antique, vintage, or imported bed frames often come with dimensions that do not conform to modern standard sizes.

These frames may have unique proportions or intricate designs that make it difficult to find a mattress that fits perfectly.

A custom mattress can be crafted to match these irregular dimensions, preserving the charm and usability of your distinctive bed frame while ensuring a snug fit.

2. Unconventional Spaces

For individuals living in or traveling with unconventional spaces, such as boats, RVs, campers, or tiny homes, space optimization is a priority.

These environments often have oddly shaped or compact sleeping areas that standard mattresses cannot accommodate.

A custom mattress can be designed to fit irregular contours, slanted ceilings, or limited spaces, maximizing comfort without compromising on practicality.

3. Special Sleeping Needs

Custom mattresses are also ideal for people with unique sleeping requirements.

Taller individuals may require longer mattresses to stretch out comfortably, while couples may prefer wider options to ensure ample sleeping space.

Families who co-sleep with children might need a mattress that combines both extra width and length to accommodate everyone comfortably. Custom dimensions provide the flexibility to address these needs, creating a sleep solution that supports restful nights for all users.

4. Aesthetic Purposes

In spaces with a creative or non-traditional design theme, a custom mattress can complement the overall aesthetic.

From circular mattresses for luxurious, modern rooms to uniquely shaped options for artistic or theme-based interiors, customization allows you to maintain visual harmony while ensuring the practicality of your sleeping setup.

A custom mattress is not just a functional investment—it is a versatile solution that enhances comfort, convenience, and style, adapting seamlessly to the specific needs of your living space or lifestyle.

Let’s take a closer look at a few common examples of this:

a. RV Mattresses

While many RVs include mattresses for their built-in beds, these mattresses are usually made of thin foam that doesn’t accommodate all of your sleep needs. If you suffer from lower back pain, consider ordering a medium-firm innerspring replacement mattress that both supports and conforms to your body.

The best RV mattresses can help your body rest in a neutral position (which keeps your neck, spine, and hips aligned), giving you a deep night’s sleep. A great way to make the most of your RV experience is buying a custom mattress that fits the bed frame perfectly and keeps you well-rested.

Additionally, RV mattresses can be customized with moisture-resistant covers to withstand humidity and temperature changes often experienced during travel. This ensures longevity and hygiene.

b. Truck Mattresses

For the avid camper, a custom mattress that can fit in the bed of a truck makes traveling the country much more accessible. More comfy than car camping but less setup than tent camping. Just make sure your custom dimensions are accurate so your bed is a perfect fit.

Also, be sure to order a truck bed mattress that is well suited to your sleep style.

• A medium-firm to firm mattress for back sleepers helps them rest in a neutral position.
• Side sleepers rest well on a medium mattress, although some prefer a plusher mattress for side sleeping because the extra softness helps keep pressure off their shoulder and hip joints.
• Stomach sleepers need a firm mattress to keep their neck, spine, and hips aligned.

For outdoor enthusiasts, adding a waterproof mattress cover or a layer of insulated foam can improve comfort while sleeping in a truck bed during cooler camping trips.

c. Boat Mattresses

Ordering custom mattresses for a boat is relatively common. Boats often don’t have beds built-in, meaning you have to install them yourself then order a mattress that fits snugly in the new frame.

Your bed frame sometimes has to be a unique shape to easily fit inside the cabin of your boat, so measure carefully to ensure you know the exact size before ordering your custom mattress.

Keep in mind that a box spring isn’t practical on open waters (in rough weather, it could slide off-center). Design your bed so it is a comfortable height for you with just the frame and the mattress.

For better durability, opt for marine-grade materials that resist moisture and mold. Adding a breathable mattress topper can also reduce condensation buildup, ensuring a dry and comfortable sleep environment.

You should also keep in mind your sleep needs when ordering a custom bed. For example, a hybrid mattress with high-density foam and at least 800 coils offers plenty of healthy support for back and side sleepers.

d. Round Mattresses

Round mattresses are an unconventional choice for people looking to make a bold design statement or maximize space in a uniquely shaped room. These mattresses are often used in modern, luxurious interiors or specialty settings like yachts or circular bedrooms.

When designing a round mattress, it’s important to specify the diameter carefully to ensure it fits the intended space. Custom bedding, including fitted sheets and duvets, is also necessary for this unique shape.

e. Loft or Bunk Bed Mattresses

Loft beds and bunk beds often require non-standard mattress sizes to accommodate their unique dimensions. A custom mattress ensures a snug fit for these spaces while maintaining comfort and safety for sleepers, especially children.

Opting for a low-profile mattress can help maximize headroom in bunk beds, while adding a mattress topper allows for increased comfort without sacrificing space.

f. Split Mattresses

Split mattresses are ideal for couples with different sleep preferences. These mattresses allow each side to have a customized firmness level or material composition. Split mattresses are commonly used on adjustable beds, where each side can be elevated or lowered independently.

This design also reduces motion transfer, making it a great choice for partners who have different schedules or sleeping habits.

g. Pet-Friendly Mattresses

For pet owners who share their beds with furry companions, custom mattresses can provide additional space for everyone to sleep comfortably. Alternatively, pet-friendly custom mattresses can be designed specifically for your pets, tailored to fit their favorite sleeping spot, like a corner of the bedroom or a cozy alcove.

Mattresses with washable, water-resistant covers are particularly useful in homes with pets, ensuring durability and cleanliness over time.

Custom Sheets and Duvets

If you purchase a custom mattress, you need custom bed accessories to fit your unique bed. Confirm the mattress dimensions with the manufacturer making your bed and use these to order custom-made:

• Sheets
• Duvets
• Mattress toppers

Investing in hypoallergenic and temperature-regulating materials for your custom bed linens can significantly enhance sleep quality, especially for those with allergies or sensitivities.

If you don’t already have a bed frame, you need to also use the mattress dimensions to find or commission a bed frame to complete your custom bed.

Eco-Friendly Mattresses

Someone may order a customizable mattress because they want a bed made of eco-friendly materials, like organic cotton, natural latex, and recycled coils. These materials decrease the number of harmful chemicals inside the mattress and tend to be more antibacterial than standard mattresses.

Another benefit of eco-friendly mattresses is their contribution to sustainability. Many customizable eco-friendly options allow you to select modular designs, meaning you can replace individual layers rather than the entire mattress, extending its life span and reducing waste.

We must stress that there is a difference between organic and natural mattresses, as organic is a more heavily regulated term. Essentially, organic means the materials passed a higher standard of production, but this means an increased cost.

How to Measure for a Custom Mattress?

Accurate measurements are essential for designing a custom mattress that fits perfectly into your desired space. A small mistake in measurement can result in a poor fit, so careful attention to detail is crucial. Follow these steps to measure for your custom mattress effectively:

1. Measure the Space

Begin by using a reliable tape measure to record the dimensions of the area where the mattress will be placed.

• Length: Measure from one end of the space to the other, ensuring the tape is taut and straight.
• Width: Measure across the space, perpendicular to the length, at its widest point.
• Height (if applicable): If the mattress needs to fit within a confined vertical space, such as a bunk bed or built-in frame, measure the height from the base to the top boundary.

Tip: Take measurements multiple times to confirm accuracy, and always measure in inches or centimeters for precision.

2. Account for Odd Shapes

If the space includes irregular shapes, curves, or angles, additional steps are needed to capture these features:

• Trace Irregular Areas: Use large sheets of paper or cardboard to trace the outline of the space. This can include curved corners, angled edges, or cut-outs for features like posts or wheel wells.
• Note Angles: Use a protractor or angle finder to measure and document the degree of any angled sections.
• Include All Details: Clearly mark any unique features, such as dips, notches, or protrusions, on the traced outline.

Tip: Provide the traced template to the mattress manufacturer for a highly accurate fit.

3. Consider Bedding Requirements

When measuring, factor in the need for bedding such as sheets, mattress protectors, or toppers:

• Allow for Bedding Fit: Ensure the mattress dimensions accommodate the added layers of bedding without becoming overly tight or restrictive. For standard bedding, stick to dimensions close to standard mattress sizes.
• Plan for Custom Bedding: If the mattress has unique dimensions or shapes, consider ordering custom bedding to match.

Tip: Add a small margin (about 0.5–1 inch) to your measurements if you prefer looser-fitting bedding.

Final Checklist

• Double-check all measurements for accuracy.
• Clearly document dimensions, including length, width, height, and any irregular features.
• Share detailed notes or traced templates with your mattress manufacturer to avoid miscommunication.
• Accurate measuring ensures your custom mattress fits perfectly, optimizing comfort and functionality in any space.

Pros of Custom Mattresses

1. Perfect Fit for Unique Spaces

Custom mattresses are designed to fit non-standard dimensions or irregular shapes, making them ideal for spaces like boats, RVs, tiny homes, or antique bed frames. This ensures every corner of your sleeping area is optimized.

2. Tailored Comfort

With a custom mattress, you can select the level of firmness, material type, and additional features such as cooling gels or adjustable layers. This personalization caters to your unique preferences and sleep needs, improving sleep quality.

3. Solutions for Special Requirements

Custom mattresses address specific needs such as extra-long lengths for taller individuals, extra-wide sizes for couples or families, or orthopedic designs for those with health concerns like back pain or pressure points.

4. Enhanced Aesthetics

They allow for creative designs that blend seamlessly into a room’s décor. Whether it’s a circular mattress for a modern aesthetic or a quirky shape for a themed room, custom options add a distinctive visual appeal.

5. Improved Durability

Since custom mattresses are often made to order, manufacturers may use higher-quality materials and construction methods. This can lead to a longer lifespan and better overall value compared to mass-produced mattresses.

6. Supports Unique Lifestyles

Custom mattresses accommodate non-traditional sleeping arrangements, such as co-sleeping families, or support hobbies like camping or sailing by fitting unconventional sleeping setups.

7. Personalized Customer Experience

The process of designing a custom mattress often involves direct consultation with manufacturers or designers. This ensures the final product aligns precisely with your expectations.

Cons of Custom Mattresses

1. Higher Cost

Custom mattresses are typically more expensive than standard mattresses due to the specialized design, materials, and labor required. This can be a limiting factor for those on a tight budget.

2. Longer Production Time

Since these mattresses are made to order, the production and delivery process can take several weeks, which may not be suitable for individuals needing a mattress quickly.

3. Limited Return Policies

Many manufacturers of custom mattresses have strict or no-return policies because the product is tailored to individual specifications. This can be a risk if the mattress doesn’t meet your expectations.

4. Difficulty in Replacements

Finding replacement parts, such as a mattress topper or protector, for a custom mattress with unconventional dimensions can be challenging and may require additional custom orders.

5. Compatibility Issues

Custom-sized mattresses may require custom bed frames, sheets, or accessories, adding to the overall cost and complexity of maintaining the setup.

6. Risk of Errors in Design

If the dimensions or specifications are not accurately communicated or measured, there’s a possibility of receiving a mattress that doesn’t meet your requirements. Correcting such errors can be time-consuming and costly.

7. Limited Availability of Manufacturers

Not all mattress manufacturers offer custom options, and those that do may not be available in all regions. This could limit your choices or require working with a distant supplier.

FAQs

Can I cut a mattress to size?

While it is possible to cut through the materials of a mattress, we don’t advise cutting your mattress. Inside there are several layers of foam, latex, and coils. And it’s nearly impossible to cut evenly through them all. Also, sealing the mattress back up in a way that keeps it from sagging on the cut side is very challenging.

Lastly, cutting up your mattress would void its warranty. This lack of protection will leave you with no defense to easily replace your mattress. It’s best to simply purchase a new mattress that is the size you need.

Do two twin mattresses make a king mattress?

Two twin mattresses (each 38 inches wide and 75 inches long) don’t equal a king sized bed (76 inches wide and 80 inches long). However, at 38 inches wide and 80 inches long, two twin XL mattresses are the same dimensions as a king sized bed.

Setting two twin XLs side by side is how a split king bed is created. Thanks to having two mattresses, a split king size mattress allows you and your partner to adjust your own side of the bed however you please.

Can I use a custom mattress with an adjustable bed?

Yes, custom mattresses can be used with adjustable beds. However, it’s important to ensure that the mattress is designed to be flexible and durable enough to accommodate the adjustments of the bed frame. Many custom mattresses, especially those made of memory foam or hybrid materials, are ideal for adjustable bases because they adapt to different positions without compromising comfort or support. Always check with the mattress manufacturer to ensure it’s compatible with adjustable bed frames.

Are there any beds that are bigger than a California King?

The Alaskan and Texas king mattresses are both bigger than a California King bed. A Cal king is 72 inches wide and 84 inches long, a Texas king is 80 inches wide and 98 inches long, and an Alaskan king is 108 inches wide and 108 inches long.

How long does it take to receive a custom mattress?

The time it takes to receive a custom mattress varies depending on the manufacturer and the complexity of the order. Generally, it can take anywhere from 2 to 6 weeks for production and delivery. However, factors like material availability, shipping times, and custom specifications can affect this timeline. It’s best to consult with the manufacturer for a more precise estimate based on your needs.

What is the biggest mattress in the world?

The biggest mattress in the world is the Alaskan king. At 108 inches by 108 inches, there is no shortage of room on this bed. The Alaskan king was most likely first produced in the 1960s-70s. Around this time, the California king was trendy. With more people interested in large mattresses, manufacturers started making beds bigger and bigger.

Are custom mattresses more expensive than standard ones?

Yes, custom mattresses typically cost more than standard-sized mattresses. The cost increase is due to the bespoke nature of custom mattresses, which are made to fit specific dimensions, materials, and design preferences. Additionally, the labor involved in crafting a mattress to precise specifications and using higher-quality materials often results in a higher price. However, the added cost is usually justified by the tailored comfort and durability they offer.

Does an RV require a custom mattress size?

Some RVs may require custom mattresses. RVs have various bed sizes, depending on whether it’s designed for a family or one couple. If it sleeps multiple people, it probably has RV bunk mattresses, which range from 28 inches wide and 75 inches long to 35 inches wide and 78 inches long. If the RV sleeps only one couple, it may have a short king (72 inches by 75 inches) or a short queen (60 inches by 75 inches), both smaller than their standard sizes.

Most RVs come with mattresses that fit each bed, but they are usually made of 5-6 inches of foam and not very comfortable. To get your best sleep while traveling, you should consider ordering a custom mattress that fits your RV bed and suits your sleep needs.

Should You Invest in a Custom Sized Mattress?

There are two main reasons to buy a custom mattress:

• You have an oddly shaped bed frame

• You just want a big bed

Both are good reasons to order a custom mattress.

We each have unique sleep needs and preferences. If a custom mattress gives you the comfort and support you need to get a good night’s sleep, that’s an excellent reason to invest in one. Complete your custom mattress with custom bed accessories and enjoy!