The grading card is made of hard materials, which can prevent cards from bent, dustproof, waterproof and scratching. They keep them together to ensure that the card is safe, acid -free and without PVC and ultraviolet protection, so that the card is away from fading or folding. Size: 3.14 "X 5.31" x 0.19 ", suitable for 2.55" x 3.54 "cards, such as football cards, standard size game cards. Each packaging contains 7 pieces, each piece of packaging separately to prevent scratches.