These Letterbox Boxes measure 170mm x 90mm x 20mm and are perfect for efficiently shipping small, lightweight items — including mobile phones, compact electronic devices, and certain medical products such as testing kits or sample containers. Their sturdy design and compact size offer a secure fit for delicate or high-value items, making them ideal for e-commerce businesses in the tech and healthcare sectors. They’re also well-suited for sending fabric swatches, providing a slim, protective solution for textile samples and similar materials. Designed for rapid and easy assembly, you can quickly secure your items using the two peel-and-seal strips at both ends, eliminating the need for packing tape. These boxes conform to Royal Mail’s Large Letter size, helping to reduce postage costs. They are delivered flat-packed in bundles of 60 for easy storage and are 100% plastic-free, fully recyclable, and biodegradable, making them a great planet-friendly choice for your business.