These Letterbox Boxes measure 225mm x 150mm x 20mm and are ideal for efficiently shipping your small, lightweight items — especially media such as DVDs, CDs, and Blu-rays. Their dimensions are perfectly suited to securely hold standard disc cases, making them a reliable choice for online media retailers, collectors, and resellers. They’re also a great option for sending fabric swatches and other flat, delicate items that require a slim yet protective packaging solution. Designed for quick and easy assembly, you can secure your items in seconds using the two peel-and-seal strips at both ends, eliminating the need for packing tape. These boxes fit within Royal Mail’s Large Letter size to help reduce postage costs. Delivered flat-packed in bundles of 40 for convenient storage, they are 100% plastic-free, fully recyclable, and biodegradable, making them an excellent eco-friendly choice for your business.