Amazon.com : 25-Pack Stay Flat Rigid Mailers 9x11.5 with Self Adhesive Seal, 450 gsm Sturdy Bulk Brown Cardboard Envelopes for Shipping Photos, Magazines, Comic Books, Art Prints, Documents, Collectibles : Office Products
12 x 10-1/2 x 2-1/8 Corrugated Ring Binder Mailer for Protection During Transit, Preprinted White, 25 per Carton
Amazon.com: Boxes Fast BFML13101 Corrugated Cardboard Literature Mailers, 13 x 10 x 1 1/4 Inches, Tuck Top One-Piece, Die-Cut Shipping Boxes, Large White Mailing Boxes (Pack of 50) : Industrial & Scientific
12-3/4 X 15 Kraft Stay Flat Mailers Set of 6 - Etsy
Amazon.com: HORLIMER 13x10x2 inches Shipping Boxes Set of 25, White Corrugated Cardboard Box Literature Mailer : Office Products
Pratt PRA0018 Recycled Corrugated Cardboard Single Wall Standard Flat Box with C Flute, 8" Length x 8" Width x 4" Height, (Pack of 25): Box Mailers: Amazon.com: Industrial & Scientific