40 x SINGLE WALL CARDBOARD BOXES. (All measurements are Length x Width x Height). The measurements listed are for the internal available space. All measurements in inches are rounded. Approximate Thickness is 3mm. High Grade Single Wall Boxes. Used Widely by On-Line Sellers. Low Cost Posting Options. The outside of the cardboard boxes is made from a composite of Recycled Paper & Kraft Paper (Kraft)(K). The inside of the cardboard boxes is made from 100% Recycled Paper (Test)(T). (The Official Specification is K/T, B Flute). All sizes and thicknesses are approximate, and our standard tolerances are in line with industry standards. However, note in particular that widths may vary by +/-5%, depths by +/-5%, thickness by +/-5%, along with weight and quantities by +/-5%. ALL ORDERS PLACED BY 11am WILL BE DISPATCHED ON THE SAME DAY. Note that Courier Companies do NOT deliver on weekends. WE CAN ONLY DELIVER WITHIN MAINLAND UK (ZONES A&B) VIA COURIER AT THE ADVERTISED PRICE. Our aim is to keep our customers 100% happy. Thanks, we really appreciate it!