9-1/2" x 12-1/2" catalog mailing envelopes feature a quick, easy Redi-Strip closure. Just peel and press for a strong, durable seal. Redi-Strip envelopes are the answer for concerns about surface germs in the workplace. Stay safe and save time with every mailing. Peelable strip protects the adhesive from dust to last longer in storage. Self-seal envelopes are compatible with inkjet printers but are not recommended for laser printers. Heavyweight, 28 lb. Kraft paper is opaque enough to protect private contents and durable enough for hard office tasks. Center seam adds strength to handle heavy contents. Large envelopes can store letter-size papers, catalogs, photos and other mailings without folding.