We use cookies to improve your browsing experience.Read our Cookie Policy here. Continue
Free delivery on all UK orders over £250. Terms apply, click here for more information.
Subcribe to our newsletter for 10% off your first order, loyalty rewards and expert ecommerce advice.
My dimensions are in:
mmcminchesmetres
I'm looking for:
BoxesBagsPostal
My sizes are:
Minimum Size (My product is this big)Approx Size (Slightly smaller is ok)
Find Products
You are at the 5+ Rate. Add 4 items to boost your savings.
Order in the next for same day despatch.
Large Letter Cardboard Boxes are perfect for keeping your postal costs to a minimum by complying with Royal Mail sizing to deliver the best possible value to you. Our range of large letter cardboard boxes comprises three of our postage-in-proportion, or PIP, cardboard postal boxes, which are available in A6, A5, and A4 sizes and up to 20mm in depth to suit your requirements for whatever you’re sending. These cardboard postal boxes are made from a robust corrugated cardboard for extra rigidity and follow a standard 0427 design; folding to assemble and using the integrated locking tabs to help prevent crushing, and then tape shut for enhanced security during transit.
