Columbian CO975 7-1/2x10-1/2-Inch Clasp Brown Kraft Envelopes, 100 Count A durable MULTI-PURPOSE envelope. Dual purpose seal allows for multiple uses. Use the moisture activated gummed seal for mailing or the strong metal clasp for repeated use and storage purposes. Heavy-duty opaque 28lb brown kraft material provides privacy of contents. Open end closure. 7-1/2" x 10-1/2" 100 envelopes