Columbian CO545 (#3) 2-1/2x4-1/4-InchCoin 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. (#3) 2-1/2" x 4-1/4" 500 envelopes