#3 Coin Envelopes - 500/box, White, Acid Free, 4 1/4" X 2 1/2" (4.25 Inch X 2.5 Inch), Best Quality Qty.: 500 pcs (1 Box) in original packing Size (W x L): 2-12" x 4 14", ideal for holding coins, small parts, keys, jewelry etc. Weight (Density) of Paper: 27 lbs (100 gsm), acid-and-chemical-free paper Flap: Pre-gummed flap for easy sealing Color: Bright white, easy write on