Bed Mattress Sizes
Basic bed sizes for all mattresses are standard in width and length of the bed. The most popular beds are twin, full queen and king sizes. Stick to the most popular sizes so you can readily find sheets, comforters, bedspreads and accessories that properly fit your mattress.
When considering a mattress size, think about your own personal sleeping habits and body size. A taller person would need an 80" long mattress. Look at the room where the bed will go and determine if it will fit. Take the size of the mattress you choose and add a minimum 30" to each direction for proper fit and walking room.
Common Mattress Size Dimensions for the United States
Twin Size Mattress - 38" wide x 75" long
Full Size Mattress - 53" wide x 75" long
Queen Size Mattress - 60" wide x 80" long
King Size Mattress - 78" wide x 80" long
California King Size Mattress - 72" wide x 84" long
XL Twin Size Mattress - 38" wide x 80" long
A split king size mattress is (2) XL Twin mattresses put side by side.