Pack of 15 A4 Cardboard Envelopes,Corrugated Expandable Capacity Book Mailers, 400gsm, Peel and Seal, Rigid Sturdy, Rip Strip Open, for Royal Mail Letter Posting by Leo Design (15)

✔️ A4 Size (234 x 334mm) – Heavy Duty 400gsm Cardboard. Provides high-impact protection for books, documents, and gifts during Royal Mail Large Letter postage. ✔️ 100% Recycled & Recyclable Cardboard – No plastic. Fully compostable and biodegradable. Can go in your household recycling bin. ✔️ Instant Access – No scissors or knives needed. Recipients simply pull the Rip & Strip tear strip to open. Safe, fast, and frustration-free. ✔️ Puncture-Resistant (Micro F Flute) – The tightly packed corrugated layer absorbs impact and stops sharp corners from poking through. Your items arrive without holes or creases. ✔️ Versatile Use – Ideal for books, brochures, DVDs, photos, and any item up to 25mm thick. One envelope does it all. Vinted packaging, Ebay packaging, Royal Mail Large Letter PIP boxes