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Bed Sizes Chart

While mattress sizes vary from brand to brand, the chart below shows the typical dimensions of each bed, along with sleeper profiles and the recommended minimum room size.
Bed Size Dimensions Minimum room size Number of sleepers Maximum sleeper height
Queen

60″ x 80″

10′ x 10′

1-2

6′ to 6’4″
King

76″ x 80″

12′ x 12′

2+

6′ to 6’4″
Recommended Room Size: at least 7’ x 9.5’

Best for: Single sleepers, typically children
The twin mattress size is the smallest of all standard bed sizes. Also known as a single bed, the twin’s narrow width accommodates most younger sleepers and fits well into small or shared bedrooms. They also make ideal daybeds and are suitable for bunk beds.
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Illustration of a teddy bear tucked in the covers of a twin size bed with measurements 38-by-75 inches.

Twin XL

Recommended Room Size: at least 8’ x 10’

Best for: Tall single sleepers, primarily teens and in college dorms
With the same width as the standard twin size but 5 inches longer, Twin XLs are ideal for taller sleepers. In rooms with limited space, it can provide optimal length to stretch out without taking up much extra square footage.

Placing two twin XLs together in one bed frame creates a split king, allowing for independent movement on adjustable bed frames.
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Illustration of a baseball jersey and mitt with a ball on a twin XL size bed with measurements 38-by-80 inches.

Full

Recommended Room Size: at least 9’ x 9.5’

Best for: Single sleepers, like teens, or cuddly couples
Otherwise known as a double bed, a full mattress is a spacious choice for young adults who toss and turn in their sleep. It’s affordable and versatile, making it a popular choice for individuals furnishing their first solo apartment or for use in guest rooms.
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Illustration of a man sleeping spread out on his side in a full size bed with measurements 54-by-75 inches.

Queen

Recommended Room Size: at least 10’ x 10’

Best for: Single sleepers, couples, or even pets
The most popular bed size on the market, queen mattresses offer suitable space for two sleepers. You’ll typically find them in primary bedrooms, though queens are also great for guest rooms that see frequent visitors. Their popularity makes it easy to find bedding, accessories, and bed frames.
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Illustration of a couple cuddling in a queen size bed with measurements 60-by-80 inches.

King

Recommended Room Size: at least 12’ x 10’

Best for: Two sleepers with room to sprawl or small families
The widest option among standard bed sizes, the grandiose king size mattress appears luxurious in extra-large primary bedrooms.

Many brands, like Purple, make split king mattresses. With the same measurements as a king, split kings are two Twin XL mattresses that allow for customized sleep experiences with different firmness or elevation levels when paired with an adjustable base.
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Illustration of a couple and child sleeping in a king size bed with measurements 72-by-84 inches.