Great Material: 12.5-inch mailing boxes made of 200#/ECT-32-E corrugated cardboard, great mass, super strong but lightweight, saves on postage and packaging costs for small business and retail shipping packaging needs Widely Used: 12.5x12.5x1 inch shipping boxes are clean, professional and ideal for mailing and storing LP records, comic books, photo albums, pictures framed and other items DIY Creative: 12.5x12.5 inch white cardboard boxes have a smooth appearance and flat edges, perfect for DIY personalization ideas Pre-Perforated Mailers: 12.5x12.5x1 box mailers easy to fold to 1/2-inch or 1-inch pre-perforated depth, holds one to three 12-inch vinyl records Extra Protection: 12x12 mailers boxes weigh only 0.28 pounds each. Note: Mailing 12-inch vinyl record requires cardboard squares to sandwich the records between them for extra protection in shipment The 12x12x1 corrugated box is packaged in a sealed compression film with the "JIACAIBOX" brand registration mark on the label. Introductions: 12 1/2 x 12 1/2 x 1 Inch white easy-fold mailers, great for mailing books, catalogs and framed pictures. Solid and easy to use, sized for shipping items, and easy to assemble boxes. Scored at multiple depths for flexibility. The boxes are thin enough to work fine as long as you put the padding inside the box. Features: ◉ Attractive and durable ◉ Fine workmanship ◉ Multi-depth ◉ Quickly package items ◉ Perfectly suited for needs Specifications: ● Material: Corrugated Cardboard ● Color: White ● Dimensions: (12.5 x 12.5 x 1)'' / (31.75 x 31.75 x 2.54)cm (L x W x H) ● Weight: 0.28lb / 0.13kg Package Includes: ✈ 25 x Corrugated Cardboard Box