Bed Dimensions and Mattress Sizes

Twin size, full size, queen size, kings size bed dimensions
Sizes         Dimensions
Crib27" X 52"
Twin39" X 75"
Twin XL39" X 80"
Full54" X 75"
Full XL54" X 80"
Queen60" X 80"
King76" X 80"
Cal King72" X 84"



Twin or Single Size Mattress
A twin or single mattress is 39” wide x 74” long. This is the smallest mattress size available. It’s ideal for children who have outgrown their crib or toddler bed. Also ideal for adults who have small bedrooms. This size is commonly used for daybeds, bunk beds, dorm rooms, or a small guest bedroom. It’s not a recommended size for those sleeping with a partner.


XL Twin Size Mattress
An XL twin mattress is 6” longer than a twin size but same width. Ideal for children who are taller or for smaller size bedrooms. This is also great for tall adults who do not have room for a wider bed. Two XL twin mattresses make up the same dimensions as one king size mattress.


Full or Double Size Mattress
A full or double size mattress is 54” wide x 80” long which is the same length as a twin mattress but it is 15” wider. Full-size mattresses are a good choice for single sleepers who like to sprawl out or for couples who have a small bedroom.


XL Full or Double Size Mattress
An XL full bed might not be a common size, but it is a versatile one. A full extra long mattress measures 54"wide x 80" long. It is just as long as a queen or king, but because of its narrower shape, it will fit better in smaller rooms. It is a great choice for teens or adults who want plenty of room to sleep but don't want to sacrifice space in their bedroom.


Queen Size Mattress
A queen mattress measures 60” wide x 80” long. It is both wider and longer than a full size mattress. Often preferred by a single person who really likes lots of extra sleeping space. It is the most popular size in the United States for couples. To comfortably fit a queen size mattress in your bedroom, it is recommended that your bedroom be at least 10’L x 10’W.


King Size Mattress
A king size mattress measures 76″ wide x 80″ long. It is the same length as a queen size but 16″ wider. Couples requiring extra space will find the king size perfect. Families co-sleeping with young children or pets prefer this size. To comfortably fit a King size mattress in your bedroom, it is recommended that your bedroom be at least 12’W x 12’W.


California King Size Mattress
A California king size mattress is 4” longer in length but narrower by 4” than a standard king. It is extremely spacious for active sleepers or couples sleeping with young children or multiple pets. To comfortably fit a California King size mattress in your bedroom, it is recommended that your bedroom be at least 12’W x 12’L.


Crib Mattress
A crib mattress is 29” wide x 52” long. These mattresses are designed for baby cribs to be used by newborns to toddlers. They are designed until a child is about 18 months old or reaches 3 feet in height or begins climbing out of their crib. A firm mattress is necessary to prevent a newborn’s face from sinking in to avoid an increased risk of SIDS.


Try Before You Buy
Most folks find it awkward, but you really do have to lie down and give the mattress a try before you buy. Be sure to fully stretch out or curl up in your favorite sleeping position. Next, roll from side to side. Then sit up as if you’re reading in bed. It is important also to sit on the edge of the mattress to test its firmness. If the store employees give you a standing ovation, you have possibly provided their best entertainment of the day. A mattress purchase is a long term investment so you have done yourself a favor too.