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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.
  1. Twin Size

    • 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.