Standard Mattress Dimensions

Baby Crib Mattress   27.5" x 52" x 6" 

Twin Mattress   38" x 75",  Twin XL Mattress   38" x 80" 

Full / Double Mattress   53" x 75" 

Queen Mattress   60" x 80" 

King Mattress   76" x 80",  California King Mattress   72" x 84" 

There are no standard depths for mattresses (with the exception of crib mattresses). Straight-top mattresses typically measure between 9 and 11 inches deep, while it is not uncommon for pillow/euro-top mattresses to measure between 14 and 16 inches deep. Foundations can make the mattress even higher, but are often available in regular and low-profile versions.