Horse Mats providing layer which helps to prevent concussion from concrete floors. Reducing stress on the legs when horses are standing on the horse mat. Top side is round button, bottom side is groove. Packing: All the mats are packing on pallet. Sizes: 4' x 6' x 3/8" 4' x 6' x 1/2" 4' x 6' x 3/4"