What Are the Standard Sizes for Twin, Full, Queen, and King Box Springs?

Twin-size box springs are usually 38 or 39 inches wide and 75 inches long, while full-size box springs are 53 or 54 inches wide and 75 inches long. Both queen-size and king-size box springs are 80 inches long, but queen-size ones are 60 inches wide and king-size ones are 76 inches wide.

Twin XL is a special size with the same width as a standard twin box spring but the same length as a queen or king, which is 80 inches. This size is often used in college dorms, which don’t have a lot of space but need beds that are big enough for tall adults.

The California King is a special size that is 72 inches wide and 84 inches long. It is made for couples who want more room for their legs or bodies.

Box springs are made to be the same width and length as mattresses, but manufacturers make them in a range of heights, usually from 5 to 9 inches. Box springs with a high or low profile can help raise or lower the bed to a comfortable height, especially for kids and people who have trouble moving around.

Box springs, which are also called mattress foundations, provide a sturdy frame that absorbs shocks and reduces the constant pressure and tension that wears out mattresses. When mattresses are put on platform beds, box springs are often used, but they are not always necessary.

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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