These odor-reducing pads lock in fluids, virtually eliminating the need to stack pads to prevent leaks. With no longer the need to stack pads, this product guarantees less wastefulness. They are available in a case of 50 20.5" x 36" pads or a case of 35 28" x 36" pads. Available in a (case of 50) 20.5 x 36 inch pads or (case of 35) 28 x 36 inch pads. They are available in cases of 50 or 35, depending on the size.