Self-sealing envelopes conveniently packaged in a bound book format. Ideal for traveling or stays neat in a desk drawer. Handy mailing labels on the inside of the book covers simplify addressing and sending. This product was made from wood sourced from a certified managed forest. Envelope Size: 9 x 12; Envelope/Mailer Type: Catalog; Closure: Redi-Strip; Seam Type: Center.