Twin sizes typically measure 38 or 39 inches wide by 75 inches long, while full sizes measure 53 or 54 inches wide by 75 inches long. Queen- and king-sized box springs measure 80 inches in length, but 60 and 76 inches in width, respectively.
Twin XL is a speciality size with the same width as a conventional twin box spring, but with a length of 80 inches, comparable to a queen or king. This size is typically utilised in college dorms with little room, however the bed must be able to accommodate tall individuals. The California King, at 72 inches wide by 84 inches long, is another speciality size meant to provide more leg or body space, especially for couples.
Manufacturers commonly offer box springs with heights ranging from 5 to 9 inches. Box springs are constructed to complement mattresses in terms of breadth and length. Box springs with a high or low profile can help raise or lower the bed to a comfortable height, particularly for children and people with restricted mobility. Box springs, also known as mattress foundations, provide a supporting structure that absorbs shock, thereby minimising the constant pressure and tension that causes mattress wear. Box springs are typically compatible with platform beds, however they are not essential.