Standard Mattress Dimensions
Knowing standard mattress sizes will help you design and make a quilt that fits a bed just right. The dimensions below are the actual mattress dimensions, not the quilt size.
Standard Mattress Sizes
MATTRESS TYPE: DIMENSION IN INCHES
Crib 28" x 52"
Twin / Single 39" x 75"
Full / Double 54" x 75"
Long Twin* 39" x 80"
Queen Size 60" x 80"
King 76" x 80"
California King 72" x 84"
* NOTE: Most college dorms use long twins
There are no standard mattress depths. Some mattresses are 9-10 inches deep, but many pillow top mattresses measure 15-16 inches in depth, or even more. Box springs and other bed components can make the mattress even higher.
If you're making a quilt for yourself it's much easier to consider all the bed size "what ifs." If the quilt is a gift, you can't even be sure which bed size it will ultimately be used on. When you aren't sure, consider making a quilt that would fit a queen mattress, the most popular bed size.