Mattress Sizes

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mattress sizes with dimensions

Whether it’s your first time buying a mattress, or it’s been awhile since you bought your last one, choosing a new mattress can be a big decision. You don’t want to spend a large chunk of change only to realize you didn’t make the right choice. Before you start to worry, we’re here to help.

We’ll break down all the mattress size terminology in this guide so you can choose the best mattress size for you, whether you’re sleeping alone or with a loved one (human or animal), or whether you like to cozy up or sprawl out.

Get started with a quick look at the chart below or scroll down for more details on each mattress size.

Mattress Size Guide

Mattress SizeDimensionsComfortably Fits
Twin38” x 75”1 person
TwinXL38” x 80”1 person
Full/Double54” x 75”1 person with a pet, 2 adults, no pets
Queen60” x 80”1 person with a pet, 2 adults, no pets
King76” x 80”1 adult with pet(s) or child(s), 2 adults with a large pet or child
California King72” x 84”1 adult with multiple pets or children, 2 adults with multiple pets or children
Crib Mattress28” x 52”1 baby
Toddler Mattress28” x 52”1 toddler

Twin Mattress

mattress twin dimensions size

Twin Mattress Dimensions: 38” x 75”

The twin mattress size is the smallest mattress size that can accommodate young children and most adults comfortably.

Great for… children, single adults, anyone with a small living situation such as a studio apartment or shared room.

Not so great for… couples, taller adult men and women, anyone who likes to spread out when they sleep. Keep in mind that 75 inches translates to 6 foot 3.

Twin XL Mattress

twin xl mattress dimensions

Twin XL Mattress Dimensions: 38” x 80”

The twin XL mattress is the mattress you’re most likely to spot in college dorm rooms. It fits in smaller living spaces while providing extra length for taller adults or teenagers.

Great for… taller adults or teenagers in a small living situation such as a studio apartment or shared room.

Not so great for… couples, anyone who likes to spread out when they sleep.

Full/Double Mattress

full double mattress size

Full/Double Mattress Dimensions: 54” x 75”

The full mattress (also known as a double mattress) provides a little over a foot more width to the bed than twin or twin XL mattresses. It used to be the standard size for couples several decades ago when homes were built smaller, but now is more commonly used for individual adults or children who can afford to have the extra space to spread out.

Great for… individual children or adults sleeping alone or with a pet, couples who like to cozy up without pets.

Not so great for… couples where one or both persons wish to have a little personal space to spread out or stretch their legs, taller adults, couples who wish to sleep with their pets.

Queen Mattress

queen mattress dimensions

Queen Mattress Dimensions: 60” x 80”

The queen mattress is the most popular mattress size sold today. It provides the extra length for taller adults, and the extra width so couples can still snuggle up but enjoy their personal space to stretch a bit, too.

Great for… adults living on their own who prefer to spread out or sleep with their pets, couples who like to sleep near each other without pets, smaller master bedrooms.

Not so great for… couples where both people like to really spread out or who wish to sleep with their pets.

King Mattress

king mattress dimensions

King Mattress Dimensions: 76” x 80”

The king mattress is the same size as two twin beds side by side. This offers couples ample room to spread out, or to sleep with a large pet or children. For couples who require different support or prefer different mattress types, you can order two different twin mattresses to fit the king bed frame.

Great for… couples who like to spread out, couples who like to sleep with large pets or children, larger master bedrooms (ideally 12 x 10 square feet).

Not so great for… couples with smaller master bedrooms.

California King Mattress

california king mattress dimensions

California King Mattress Dimensions: 72” x 84”

The California king mattress is the longest mattress size out there (unless you order a custom mattress, of course)! This is the couple-size version of the twin XL mattress – it provides extra inches for taller adults.

Great for… taller couples who like to spread out, couples who like to sleep with multiple large pets or children, larger master bedrooms.

Not so great for… couples with smaller master bedrooms.

Crib Mattress

crib mattress dimensions

Crib Mattress Dimensions: 28” x 52”

Crib mattresses are designed for – you guessed it – cribs for newborns and babies. These are designed for crib frames and will last until your child meets one of the following conditions: is about 18 months old, reaches 3 feet in height, or begins escaping their crib. Search for as firm a mattress as possible. Young infants aren’t able to maneuver themselves so if the mattress is too soft and their face sinks in, they are at increased risk of SIDS or suffocation.

Great for… children up to 18 months old or less than 3 feet in height.

Not so great for… everyone else.

Toddler Mattress

toddler mattress dimensions

Toddler Mattress Dimensions: 28” x 52”

Toddler mattresses are typically the same size as a crib mattress. What’s different is that toddler mattresses are slightly softer, and are placed in toddler bed frames versus cribs. Parents can opt to buy detachable safety rails to protect the child from falling out. Some parents skip the toddler mattress altogether and move straight to a twin mattress after the crib.

Great for… toddlers or small children.

Not so great for… everyone else.

A Note on Body Weight and Mattress Size

Mattresses can range in height from 6 to 15 inches, but most fall in the 8 to 10 inch range. This range will provide sufficient support for individuals or adult couples of average weight between 120 – 230 pounds.

If you and/or your partner weigh less than 120 pounds, you can search for a mattress of lower thickness to save some money, but you’ll still receive the support you need with a standard mattress height.

If you and/or your partner weigh more than 230 pounds, you need a thicker mattress with additional layers to provide adequate support. Look for a mattress that’s at least 10 inches, ideally at least 12.

Additional Resources

  • Our  Mattress Warranty Guide details everything you need to know about what is and what isn’t covered under a mattress warranty.
  • Confused by all the sleep industry lingo? Our Mattress Glossary has you covered.
  • Interested in purchasing a mattress? Check out our comprehensive Mattress Review Database to find all the information you need to make an informed decision
  • Not sure what to do with your old mattress? Visit our Mattress Disposal Guide to figure out next steps.
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