What Is the Width of an Average Mattress?


Quick Answer

Mattresses come in various sizes that are standardized across the industry. Depending on the size, mattresses can measure from 39 inches wide (twin) to 76 inches wide (king).

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Full Answer

The smallest mattress is the twin and it is approximately 39 inches wide and 75 inches long. A more recent entry into this size is the twin XL, which adds an additional 5 inches to the length. The full-sized mattress is 54 inches wide and a queen is very close at 60 inches. The queen-sized mattress is the most popular. The king-sized mattress is much wider than the queen at 76 inches.

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