Q:

What are the size dimensions of a king size mattress?

A:

Quick Answer

A king size mattress is approximately 76" wide and 80" long, but dimensions can vary depending on manufacturer and style. A California king mattress is about 72" wide and 84" long. The two are also known as Eastern and Western king mattresses, respectively.

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Full Answer

The height of king mattresses vary among brands which accounts for differences in overall dimensions as well. The California King is the longest of mattresses, while the standard king is the same length as the queen and extra long twin mattresses. Both types of king mattresses utilize split box springs for foundations, with the standard king being equivalent to the width of a twin size mattress or frame.

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