17/12/2025
Our Royal Mail Large Letter Boxes are expertly designed to fit Royal Mail’s Large Letter PiP specification, helping your business reduce postage costs — without compromising on protection or presentation.
Manufactured from high-strength slimline corrugated board, these boxes keep your products secure, lightweight, and letterbox-ready.
✅ Royal Mail Compliant – fits Large Letter size (max 35.3cm x 25cm x 2.5cm, up to 750g)
✅ Quick & Easy Assembly – supplied flat, folds together in seconds
✅ Peel & Seal Closure – fast packing, no tape required
✅ Ripper Tear Strip – easy opening for a better unboxing experience
✅ FSC Certified & 100% Recyclable – strong, sustainable, and plastic-free
Available in two popular sizes — A4/C4 and A5/C5 — our PiP Boxes are perfect for mailing books, documents, gifts, accessories, small electronics, and more.