Holds over 300 3×4 toploads. Holds about 100 Graded cards. Exterior Dimensions (WxHxD): 7 5/8 x 6 x 15 5/8. Interior Dimensions (WxHxD): 7 1/8 x 5 3/4 x 14 1/8. The BCW Storage Box is the highest quality, most competitively priced cardboard storage box on the market today. They are constructed of white corrugated paper and have a 200 lb. test strength. Use this box to store and protect your PSA, Beckett and other graded cards as well as ?-inch screw downs.