Choose Jam Paper a7 invitation booklet envelopes for all your mailing needs. Featuring a clean white exterior and unusual, eye-catching square shape, these booklet envelopes are all you need to make a statement. Insert wedding invitations, thank you cards, holiday greetings, announcements, notes, small photographs, and more! Recipients are certain to take notice of your letter upon receiving. Your mail remains protected as each envelope is made from durable 24 lb. Paper. This pack contains 100 white envelopes measuring 5 1/4" x 7 1/4". Each envelope has a booklet opening, straight flap, gum closure, and smooth finish. Size: 5.25In x 7.25In | color: white | quantity: 100/pack