25-Pack Brown Rigid Mailers That Stay Flat 13x18, Bulk Kraft Paper Sturdy Cardboard Envelopes, 450 GSM for Shipping Photos, Packing Documents, Gift Cards, CDs, Art Prints - Walmart.com
Amazon.com: BOX USA Shipping Boxes Small 12"L x 10"W x 4"H, 50-Pack | Corrugated Cardboard Box for Packing, Moving and Storage : Office Products
Mailer Box 16x12x2" | White Locking Mailers
Custom Mailer Box | Box Genie – BoxGenie
Buy Blank White & Kraft Cardboard Mailer Boxes Online | Arka