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What Are the Differences in Mattress Sizes?

Choosing the right size of mattress depends on the space you are putting the mattress in and the person it's intended for. A mattress for a child's bedroom will most likely be smaller than a mattress intended for a master suite. The dimensions of mattress sizes are usually measured in inches, but can be converted to make purchasing a mattress easy for you.


Twin Size

Mattress come in different sizes.

Twin size mattresses comes in two different variations, twin and twin extra long.  A regular twin mattress is 39 inches wide and 75 inches long.

A twin extra long is 39 inches wide and 80 inches long.  This size is suitable for a toddler or child bed.


Full Size

Full size mattresses are also available in two different variations.  A regular full size mattress is 54 inches wide and 75 inches long.

A full extra long mattress measures 54 inches wide and 80 inches long.  This size is commonly found in university or college dorm rooms.


Queen Size

A queen size mattress measures 60 inches wide by 80 inches long, and is a workable size for most master bedrooms.  Queen size beds are often offered at hotels and motels.


King Size

King size mattresses are available in two different variations.  A regular king size mattress measures 76 inches wide by 80 inches long.

A California, or Western, king mattress is 72 inches wide by 84 inches long. 

About the Author

Heather Johnson started writing health, fitness and nutrition articles for LIVESTRONG.COM in 2011. She has volunteered in physical therapy clinics and completed field studies assessing the fitness and nutrition levels of children at local elementary schools. Johnson also holds a Bachelor of Science degree in health fitness with a minor in nutrition from Central Michigan University.

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