6" x 9" Postage Saving ClearClasp Envelopes feature a reusable, Redi-Tac closure for repeated use when storing or routing documents. Innovative technology eliminates the USPS upcharge when mailing a metal clasp. Fully gummed flap provides a secure, permanent seal. Sturdy, 28 lb. brown Kraft stock protects documents while in transit or storage. Multifunctional envelopes are a must-have for any office.