LUX Invitation envelope features a moistenable glue square flap for secured sealing. Multipurpose envelope measuring A7 (5 1/4" x 7 1/4") is inkjet compatible, with weight of 24 lbs, sold as 1000 per box..Opening: Square flap.Comes in 24lb. Bright White, 24lb. Text Paper.1000/box.Closure: Moistenable glue.Ideal for social and announcement functions; it may also be utilized as an outer envelope for invitation purposes.Material: Paper.Moistenable Glue Sealing Method.Collection name: White.Boasting a smart-looking square flap, the A7 envelope fits inside envelope sizes A8, A9, A10.Inkjet printer compatible.A7 Invitation Envelopes (5 1/4 x 7 1/4) are perfect for party invites/thank you cards/wedding invites/announcements/5x7 photos.LUX Invitation envelope measuring A7 (5 1/4" x 7 1/4") has a paper weight of 24 lbs and is perfect for social or announcement functions, sold as 1000 per box..The A7 Envelope (5 1/4" x 7 1/4") in 24lb. Bright White is a versatile, light-weight, square flap envelope, perfect for mailings, holding 5" x 7" photos, invitations, announcements and more. Seal by moistenable glue along flap. Available either plain or printed.