Staples #9 Gummed White Double Window Security Envelopes - 3-7/8" x 8-7/8" - 500 Pack

Staples #9 Double window envelope standard invoice measures 3-7/8" x 8-7/8" and is used for privacy/confidentiality. Envelope is protected throughout transport and it contains forms produced by most software mail systems, sold as 500 per box.