Understanding how to make a quilt highly depends on mattress sizes. Knowing the sizing makes it much easier to design and make a jelly roll quilt that fits the bed perfectly. Knowing your sizing greatly determines the amount of space you will have for patterns and style for your quilt.
Crib : 28″ x 52″
Twin (Single) : 39″ x 75″
Long Twin : 36″ x 80″ (Most beds in college dorms have long twin mattresses)
Full Mattress, (Double) : 54″ x 75″
Queen: 60″ x 80″
King: 76″ x 80″
California King: 72″ x 84″