JAM Paper® Booklet Envelopes are a superior envelope option for sending larger mailings. Insert your announcements, greetings, business correspondence, marketing materials, invitations, brochures, flyers and much more with no hassle, cramming, or folding as they measure a comfortable 9" x 12". Made of 28 lb. paper with a texture finish, both you and recipients will immediately see and feel the difference. Appropriate to use in the office, home, classrooms and everywhere in between. This pack contains 50 Dark Red envelopes. Each envelope has a straight flap, booklet opening, and gum closure.