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While twin XL is preferable (minimum length of 90"), twin comforters and duvets (86" and up) can work on an 80 inch extra long twin mattress but they will be short. Please note that your mattress topper, fitted sheet, mattress pad, and bed skirt must be manufactured to properly fit a twin extra long mattress.

A standard king size bed frame measures 76 inches wide by 80 inches long. A California king size mattress measures 72 inches wide and 85 inches long, making it five inches longer but four inches narrower than a standard king size mattress.

The super king size bed is the largest bed widely available, and only the emperor size is larger. In the UK, super king size beds measure at 72 x 78  or 6 by 6.5 feet.

According to the company, Ace is significantly bigger than your average king size mattress, with dimensions measuring 108 inches by 80 inches (an average king size mattress in the U.S. is 76 inches by 80 inches).

A king sized bed is 76 inches wide, while a queen sized bed is 60 inches wide. In fact, most modern steel bed frames can accommodate both the queen sized and the king sized bed. And the headboard attaches to the bed frame, making the headboard extension much easier. A headboard can be extended to fit a king bed.

A standard double bed is 4 feet 6 inches wide and 6 feet 3 inches long (137 x 190 cm). This is the most common and widely available size for all bed types in the UK. A standard king size bed is 5 feet wide and 6 feet 6 inches long (150 x 198 cm).