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   72" x 80",  California King Mattress   76" 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. Box springs can make the mattress even higher, but are often available in regular and low-profile versions.