What Size Is a Twin Mattress?


Quick Answer

A North American standard twin-sized mattress measures 39 inches wide by 75 inches long. A twin-XL mattress, which accommodates taller sleepers, measures 39 inches by 80 inches.

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What Size Is a Twin Mattress?
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Full Answer

Mattress thickness, or height, varies depending on the amount of padding and other manufacturer specifications. In other countries, standard twin mattress sizes are typically 1 to 6 inches narrower and shorter than the North American mattresses. All mattresses are made slightly smaller to fit inside standard bed frames. Many mattress manufacturers also offer custom-sized alternatives to fit specialty or antique bed frames. Twin-sized mattresses are commonly used in guest rooms, bunk beds, day beds and dormitories or other small spaces.

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