Color: Transparent, Black; Material: Polystyrene; Suitable for Coin Size:17mm, 22mm, 27mm, 32mm, 37mm; Size: 48 x 48 x 7mm / 1.89 x 1.89 x 0.26 inch(L*W*H) Advantage: Made of PS material, waterproof and dustproof, lightweight, stable, and durable.