Columbian CO565 (#5-1/2) 3-1/8x5-1/2-Inch Coin Brown Kraft Envelopes, 500 Count Envelope is ideal for storing and transferring of coins, jewelry, stamps and other small objects, parts and materials. Heavy-duty 28lb opaque brown kraft material provides privacy of contents. Wide seams and a deep, moisture activated gummed seal secures and protects contents. (#5-1/2) 3-1/8" x 5-1/2" 500 envelopes