Collection: 18x18" Poly Mailers Largest Size for USPS Cubic Softpack Tier 5

Our 18x18" flat poly mailers are perfect for USPS Cubic Shipping. Ship anything that will fit, under 20 pounds, for a low flat cost by zone. Does your business utilize Cubic Shipping? These 18x18 poly mailers are the largest size that  you can use with Cubic Shipping Softpack Tier 5. We currently offer a pale green cactus design  and a nautical blue whale design in our 18x18 poly mailers. These mailers are great for shipping  large orders of non-fragile clothing, cookware, variety of shoes such as boots, sneakers,  wedges, textbooks, novels, home décor, rustic signs, framed artwork, Christmas and birthday  gifts, toys, even small bags of dog food! Great shipping option for those who operate an online  consignment shop, clothing and shoe boutiques, Pampered Chef consultants, Lifes Abundance  representatives, Discovery Toys consultants and anyone who ships large items or large quantities will enjoy this efficient packaging option.