Good material: coin holder is made of good quality cardboard, crystal clear windows, low dust level offer great protection for your coins. Simple to use: simply set your coin onto the clear window, fold, and seal with staples or tape; You can write coin details and notes on the outside total 250pcs , 2X2 inch Lewano Brand Cardboard Coin Holders Outer Size = 2*2inch , inner hole Sizes = (22mm=25qty, 25mm=50qty ,27.5mm=75qty, 29mm=50qty ,33mm=50qty )