Universal One Envelope, 10 x 13, Self-Stick, Brown, PK250 UNV35292 | Zoro
Amazon.com : Quality Park 7-1/2 x 10-1/2 Clasp Envelopes, Clasp and Gummed Closures for Storing pr Mailing, Extra Heavy-Duty 32 lb Kraft Paper, 100 per Box (QUA37775), 7.5 x 10.5 : Office Products