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Twin XL Bed Size & Dimensions Guide

Upgrade your sleep setup with a Casper twin XL bed size, designed to offer extra length without taking up more width // perfect for taller sleepers, teens, and dorm-style spaces. The twin XL mattress size provides added comfort compared to a standard twin, making it a smart choice when comparing twin vs twin XL size options. Whether you’re looking closely at twin XL dimensions or exploring if a twin XL size is right for your space, Casper makes it easy to find the right fit for better rest.

Twin XL Mattress Size

80” L x 38” W

The twin’s slightly longer cousin, the twin XL mattress, is the most popular size for college dorm rooms. It measures five inches longer than a twin, at 38 inches wide and 80 inches long. In addition to students, XL twin beds are a good solution for taller teenagers and individual adults with limited space. These beds can also be put together if you’re choosing a split king adjustable base for full body adjustability!

thumbs_up_double.svgBest for
taller teenagers, single adults, or anyone with limited space.

straighten.svgRoom size
The minimum room size for a twin XL mattress to fit naturally is 8 x 10 feet. Twin XL beds can also work well in narrow rooms that are at least 7 feet wide.

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