Skip to main content
Menu
MattressFirm Logo

King Size Mattresses

Providing the most room of any bed, couples find they have more space to accommodate their different sleep positions (and their pet!).

267 Results

Showing 14 of 267

King Size Mattresses

Measuring 76" wide and 80" long, a king size mattress provides plenty of space for a couple to sleep comfortably. Not every bedroom can fit a king mattress, so be sure to measure that the king mattress size is not too big for your sleeping space before getting your heart set on one of the many king bed mattress options available. Simmons was the first company to market the king mattress size.