Color: Transparent, White; Material: Polystyrene; Suitable for Coin Size:18mm, 23mm, 28mm, 33mm, 38mm; 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.