Smartots Deluxe Crawling Mat, 6' x 6' The interlocking crawling play mat can over up to 36 square feet (6' x 6') area Can construct various sizes of boxes or cubes Features 36 pieces of colorful foam mat with edges & borders Mat Dimensions: 12" (L) x 12" (W) x 3/8" (H) Material: Non-toxic high density EVA foam