Color: Transparent, Black; Material: Polystyrene; Suitable for Coin Size:20mm, 25mm, 30mm, 35mm, 40mm; 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.