Non-abrasive, flexible silicone sponge has super soft bristles. 3000 bristles instantly loosen and clean dirt from virtually any surface. Bacteria and mildew resistant. Built-in suction cup. Can be used as pot holders. Purple sponge: 5.5 In. square, green sponge: 5.5 In. Dia. and orange sponge: 3.8 In. x 5 In. Dishwasher safe.