What is the difference between a Twin and a Twin XL mattress?

The standard dimensions for Twin mattresses are 39” W x 75” L. The Twin XL mattress dimensions are

39” W x 80” L. The Twin XL is 5 inches longer than a Twin mattress making it the same length as a queen and king.

If you are interested in a split King setup, you will want to use 2 Twin XL mattresses.

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