How thick should my gymnastics mat be? A How thick should my gymnastics mat be? For home mats and gyms with spring floors, most gymnastics mats are 1 3/8” thick with two layers of premium XPE foam. For gyms without spring floors, most gymnastics mats are 2” thick with three layers of premium XPE foam. Share facebook twitter linkedin pinterest email Back to Top How do I cut gymnastics mats to size for installation? How big is a gymnastics or cheer mat?