How to Choose a Mattress

To choose a mattress, match firmness to your sleeping position and weight, pick a type that fits how warm you sleep and whether you share the bed, then choose a size, set a budget, and buy with a trial of at least 60 to 100 nights. Side sleepers usually need a softer surface than back or stomach sleepers.

The sections below cover the features you need, mattress types, a firmness chart by sleeping position and weight, a size chart, typical prices and where to buy, how to compare specs, and what to check in a trial and warranty.

Which Mattress Features Matter Most to You?

The features that matter most depend on how warm you sleep, whether you share the bed, and how much you use the edge. Start by listing what you like and dislike about your current mattress, then use the table below to turn those notes into a shortlist.

When I test edge support, I sit on the perimeter and watch how far it compresses, a check you can also do in a showroom. If the edge folds under you when you sit, expect it to feel less stable when you sleep near it too.

Plan for what goes under and on top of the new bed, too. Foam, latex, and hybrid mattresses tend to work best on a slatted or solid foundation or a supportive bed frame rather than an old box spring. New pillows or blankets may be worth budgeting for at the same time.

Which Mattress Type Is Right for You?

The right mattress type depends on the feel you want: memory foam for a close hug, latex for buoyant bounce, a hybrid for contouring over coil support, or innerspring for a traditional springy feel. The main types of mattresses also differ in heat, motion isolation, and price.

Memory Foam

Memory foam softens under body heat and molds to your shape, spreading pressure at the shoulders and hips. That close hug is why many side sleepers and couples like it, since the foam also dampens movement.

The common complaints are heat and a stuck feeling when you change positions. Many brands add gel, graphite, copper, or plant-based oils to the foam to help with both. When I change positions, I note how quickly the surface adjusts, and faster-recovering foams feel far less sticky.

Latex

Latex is a responsive foam, and natural latex is made from rubber tree sap. It pushes back rather than letting you sink, feels bouncy, and tends to trap less heat than memory foam.

Latex tends to cost more, commonly $1,000 to $2,500 for a queen, but it is also among the most durable materials and often lasts around 12 to 15 years. If you want contouring without the slow sink of memory foam, latex is worth a look.

Innerspring

Innerspring mattresses use a steel coil core under a thin comfort layer of fiber or foam, giving a bouncy, familiar feel and plenty of airflow. Some add a pillow top or Euro top for extra cushioning: a pillow top is sewn on top of the mattress, while a Euro top is sewn under the cover so it sits flush with the edges.

Connected coil designs tend to transfer more motion and can sag or squeak sooner than foam or hybrid beds. If you prefer the classic feel, the innerspring mattress buying guide covers coil types and what to check.

Hybrid

Hybrid mattresses pair a pocketed coil support core with foam or latex comfort layers, so you get contouring on top and bounce and airflow underneath. Because each coil is wrapped in fabric, hybrids tend to stay quieter and isolate motion better than traditional innersprings.

Hybrids usually cost more than all-foam beds, and they tend to be heavier to move. The comparison of hybrid and latex mattresses covers the tradeoffs between two of the pricier types.

Airbed

Airbeds use air chambers you inflate or deflate to set the firmness. Basic air mattresses suit guest rooms and camping, while adjustable air beds built for nightly use often let each side of the bed set its own firmness.

The tradeoff is durability, because pumps, valves, and chambers are more parts that can leak or need repair. Check whether the warranty covers the pump and chambers, not just the cover and foam.

What Mattress Firmness Do You Need?

Your sleeping position sets your starting firmness, and your body weight moves it softer or firmer. Use the chart below with the Sleep Junkie mattress firmness scale, where 1 is softest and 10 is firmest, to find the most comfortable mattress range for you.

If you switch mostly between back and stomach, lean toward medium-firm or firm; if you switch between side and back, medium usually works. Lying on my side, I pay attention to pressure at the shoulder and hip, and a bed that presses hard at either spot is too firm for side sleeping. For specific picks, see the mattresses for side sleepers, mattresses for back sleepers, mattresses for stomach sleepers, and mattresses for combination sleepers.

How Body Weight Changes Your Firmness

Standard firmness advice assumes a sleeper between about 130 and 230 pounds, so adjust one step if you fall outside that range. If you weigh under 130 pounds, go one step softer than your position suggests; a back sleeper, for example, may prefer medium over a medium-firm mattress. The best mattresses for petite sleepers focus on this range.

If you weigh over 230 pounds, go one step firmer, so a side sleeper may be better off on medium-firm than medium. Heavier sleepers also tend to do better on thicker hybrids with coil support, so see the options for people who weigh more than 230 pounds.

What Size Mattress Should You Get?

Get the size that fits how many people share the bed, how tall you are, and how much floor space you have. Queen is the most popular size for adults, while a king gives couples the most width. The table lists standard US dimensions, and the guide to choosing the right mattress size has more detail.

A full is 16 inches wider than a twin but still narrow for two adults. A California king is the longest standard size, but a standard king has more total surface area. As a rough guide, allow a room of at least 9 by 9 feet for a twin, 10 by 10 feet for a queen, and 12 by 12 feet for a king so you can walk around the bed.

For shared kids’ rooms, twin XL mattresses fit many bunk beds, so check the bunk bed mattress sizes before you buy. A full also works well as a mattress for a teenager who needs room to grow.

What Mattress Should You Buy for a Child?

For a child’s first big-kid bed, a twin is the usual pick, while a twin XL or full lets a growing child keep the same mattress into the teen years. Choose firmness by the child’s sleeping position, as you would for yourself, and see the guide to a good mattress for a child for specific options.

Add a waterproof mattress protector and sheets that are easy to wash, since kids’ beds see spills. A pillow sized for the child is worth adding at the same time.

How Much Should You Spend on a Mattress?

Plan on roughly $500 to $1,500 for a well-made queen mattress, with latex models and many hybrids costing more. A higher price doesn’t always mean better quality, but very cheap beds are more likely to lose comfort and support early.

If your budget is tight, online mattresses often cost less than showroom beds because the brands skip store overhead, and many run regular discounts. Browse the best budget mattresses for lower-priced picks, and see the mattress buying guide for when sales tend to happen.

Where you buy matters less than the return policy. If you plan to order online, the guide on how to buy a mattress without trying it out explains how to narrow your choices sight unseen, and the trial checklist below covers what to confirm before you pay.

It can be tempting to buy a used mattress to save money, but its condition is hard to check, and warranties usually don’t transfer to a second owner. A used bed may also need replacing sooner, which erases the savings.

How Do You Compare Mattresses Side by Side?

Compare mattresses by construction rather than brand name: total height, what each layer is made of, the cover fabric, and any third-party certifications. Construction tells you more about how a bed will feel, how long it will last, and whether it’s worth the price.

For most adults, a mattress at least 10 inches thick leaves enough room for comfort layers over a support core, though 8 or 9 inches can work for budget or guest beds. Check that the support core makes up at least half the height, so a 12-inch mattress should have about 6 inches of support. The guide to mattress thickness covers height by sleeper.

Certifications tell you what was tested, not how a bed feels. The common ones cover:

• CertiPUR-US: polyurethane foam tested for content, emissions (low VOC), and durability by independent labs
• OEKO-TEX STANDARD 100: textiles tested for a list of harmful substances
• GOLS: latex made with at least 95 percent certified organic raw material
• GOTS: textiles made with organic fibers (at least 95 percent for the “organic” label, at least 70 percent for “made with organic”)
• GREENGUARD Gold: products tested for low chemical emissions into indoor air

Once you have a shortlist, read reviews from verified buyers, ideally collected by a third-party platform so the brand can’t choose which ones appear. Read the low ratings too, and look for patterns such as early sagging or a feel that runs softer or firmer than listed.

What Sleep Trial, Return Policy, and Warranty Should You Look For?

Look for a sleep trial of at least 60 to 100 nights, a free or low-cost return, and a warranty that covers sagging. Trials commonly run anywhere from 30 to 365 nights, and adjusting to a new surface can take several weeks, so a short trial may end before you know whether the bed suits you.

Before you buy, check these details:

• Whether returns are free or carry a pickup or restocking fee
• Whether you get a full refund or only an exchange
• Whether you must keep the mattress a minimum number of nights before returning it
• How long the warranty lasts and whether it is prorated in later years
• How deep a body impression must be before the warranty counts it as a defect

Use the trial as a structured test rather than a wait-and-see. The guide on how to test a mattress lists what to check for firmness, support, motion, and edges.

Frequently Asked Questions

How do I know it’s time for a new mattress?

Replace your mattress when it sags, has lumps or deep body impressions, or you wake up stiff and sleep better on other beds. Most mattresses last about 7 to 10 years, though latex often lasts longer and low-cost foam can wear out sooner. Comfort matters more than age, so an uncomfortable newer bed can be worth replacing too.

Is it better to sleep on a hard or soft mattress?

Neither is better for everyone, because the right feel depends on your sleeping position and weight. Firmer beds tend to keep back sleepers, stomach sleepers, and heavier people closer to neutral alignment, while softer beds let side sleepers and lighter people sink in at the shoulders and hips. Many people land between medium and medium-firm.

What type of mattress is best for most people?

No single type suits everyone, but memory foam and hybrids fit the widest range of sleepers. Memory foam works for people who want close contouring and little motion transfer, hybrids add bounce and airflow for warm sleepers and heavier bodies, and latex suits people who want a responsive, long-lasting feel. Innerspring fits tighter budgets and guest rooms.

Do I need a box spring with a new mattress?

Most memory foam, latex, and hybrid mattresses don’t need a box spring. They tend to work best on a slatted or solid foundation, a platform bed, or an adjustable base, while box springs were built for traditional innerspring beds. Check the brand’s warranty terms, since many list the support they expect, such as a maximum gap between slats.

How long does it take to get used to a new mattress?

Give a new mattress about 30 to 60 nights before deciding. Your body needs time to adjust to a different surface, and new foam can feel firmer at first before it breaks in slightly. Sleep on it every night, note how you feel each morning, and start a return before the trial ends if it still feels wrong.

The Bottom Line

Choosing a mattress comes down to matching firmness to your sleeping position and weight, picking a type that fits how warm you sleep and whether you share the bed, and buying the right size with a long trial as your safety net. Expect a few weeks of adjustment before you judge the new bed. When you are ready to compare specific models, start with the best mattresses for every sleep style.