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Standard Mattress Sizes

A Guide to Bed Mattress Dimensions

A guide to standard mattress sizes can be helpful as it can often be difficult to decide on the best size. Much goes into the choice of a new mattress.

There are so many styles and materials available and mattress dimensions run from cradle to king size.

Yet it is important for consumers to know what choices are available so that they can choose wisely. Making the right choice in size will affect our comfort as well.

After all, we spend about one-third of our lives in bed. A good choice of mattress can make the difference between years of restful sleep versus years of restless, inadequate sleep.

A general rule of thumb for choosing suitable mattress dimensions is to choose one that exceeds the buyer's height by at least six inches. During the night, people shift positions dozens of times, and the extra room with those dimensions helps ensure the sleeper remains entirely on the mattress.

Cradle Mattresses

Starting with the tiniest of the standard mattress sizes, cradle mattresses are often necessary when new parents "inherit" cradles that don't have mattresses and therefore leave the cradle unused, even though the gentle rocking motion is calming to new babies.

Cradle mattresses are most commonly available in two standard mattress sizes, 18 x 36 inches (46 x 91 cm), and 15 x 33 inches (38 x 84 cm).

Crib Mattresses 28 inches x 52 inches (72 cm x 132 cm)

These are usually four inches thick and measure 28 x 52 inches. Unlike cradle mattresses, crib mattresses come in one standard size, which makes it easier to buy cribs, sheets and mattresses separately.

For safety, the thickness is usually limited to four inches or less, as a thicker mattress may pose a health risk to infants. There are also toddler beds that look like smaller versions of twin beds that use crib size mattresses.

Twin Mattresses 39 x 75 inches (99 x 190 cm)

Twin size or single beds are most often found in children's rooms because they fit children best and don't take up as much floor space as larger beds, leaving more room for other furniture, toy boxes, or other items. This is also the standard size for daybeds.

The standard twin size mattress dimensions are 39 x 75 inches (99 x 190 cm), and thickness varies, but is usually 8 to 10 inches (20 to 25 cm) thick.

Twin XL Mattresses 39 x 80 inches (99 x 203 cm)

There are also twin beds that are extra long (designated as XL twin). These standard mattress sizes are most common in college dorm rooms where space is at a premium but the sleepers are taller than young children.

These mattresses are generally 39 x 80 inches (99 x 203 cm), and generally 8 to 10 inches (20 to 25 cm) thick. When buying sheets for these beds it is important to look for sheets sized specifically for the XL twin size mattress dimensions.

Full Mattresses 54 x 75 inches (137 x 191 cm)

Full or "double" sized mattresses work well for people who are 5 feet, 9 inches tall (175 cm) tall and under. These mattresses can fit two people of average weight. Larger people may want to consider larger standard mattress sizes for the added width they include. Often used in guest rooms or smaller spaces, Full (double) mattresses are 54 x 75 inches (137 x 191 cm) in size.

The thickness of a full mattress will depend on the material it is made of and other mattress qualities, such as its firmness or addition of a pillow top. Depth can range from a thin 4 inches up to 25 inches.

Queen Size Mattresses 60 x 80 inches (152 x 203 cm)

Queen mattress dimensions are the most popular bed size. They sleep two people of up to 6 feet, 2 inches (188) cm tall. They are also six inches wider than a double, making them more suitable for larger people.

These mattress dimensions are 60 x 80 inches (152 x 203 cm) in size. Like full mattresses, the thickness will depend on the material the mattress is made from as well as other characteristics.

King Mattresses 76 x 80 (198 x 203 cm)

King size mattress dimensions are the widest of the standard mattress sizes at 76 inches (198 cm). They are 80 inches (203 cm) long, so they comfortably accommodate two sleepers of 6 feet, 2 inches (188 cm) tall.

They are generally thicker than double mattresses, but again, the thickness of a king size mattress depends on the material from which it is made.

California King Size 72 x 84 inches (183 x 213 cm)

The California king sized mattress is narrower, but longer than the regular king sized mattress. This size is growing in popularity, especially with taller consumers.

More popular in the Western United States, it is becoming easier to find on the East Coast as well. At 72 x 84 inches (183 x 213 cm) in size, these mattresses require sheets that are designated California King size.

Mattresses have undergone lots of changes in recent years in terms of materials and technological advances, though standard mattress sizes have stayed the same.

Related Articles

Mattress Size Charts - Navigating the World of Bed Sizes - Mattress size charts are just one of the things to consider when you are buying a bed. Even if you find the right material, the perfect firmness, and a great price if your bed is too small you will still be uncomfortable.

Queen Mattress Dimensions - A Queen Mattress Size is Just Right - Queen mattress dimensions are just right; not too big and not too small. Most couples who share a bed find that a queen bed is a good compromise between a cramped full size bed and an expensive and difficult-to-maneuver king size bed.

King Size Mattress Dimensions - The Spacious King Mattress Size For Comfort - King size mattress dimensions give couples enough room to spread out and get comfortable when they are sleeping. You may not realize it, but with a full size mattress, your personal sleeping space is no wider than what is allotted to a baby in a crib.

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