Large Letter Boxes

Lightweight, letterbox‑friendly packaging designed to meet Royal Mail Large Letter size rules. Perfect for small eCommerce items, documents and gifts, these boxes help you keep postage costs low while ensuring a smooth delivery experience.

Made from high‑quality corrugated cardboard, they provide a snug, protective fit that reduces movement and helps prevent damage — especially when paired with bubble wrap. Their plastic‑free, 100% recyclable and biodegradable design makes them an eco‑friendly choice for modern businesses.

Branding is printed discreetly on the inside, remaining hidden once constructed. Some products in this range follow the same box style but fall under Small Parcel sizing — please check dimensions before packing. Avoid overfilling to stay within Royal Mail’s Large Letter restrictions.

Next‑day shipping options available to keep your orders moving quickly.

📦 Size Guide

All measurements shown are internal dimensions. Choose your required size from the options above.