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UK Based
Free Next Day Delivery
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UK Based
Free Next Day Delivery
Product Details
Product Information
Our Royal Mail Large Letter Die Cut Postal Boxes are manufactured from high-quality UK-made single wall corrugated cardboard and are designed to meet Royal Mail Large Letter size requirements. These premium 0427-style die cut mailing boxes feature secure fold-over ends with earlock lids, providing a professional presentation and reliable protection for documents, books, photographs, stationery, media and other slim products during transit. Supplied flat packed, they assemble quickly without the need for tape, making packing fast and efficient.
Available in both Brown and White finishes, these postal boxes are ideal for eCommerce businesses, online retailers, offices and home users looking for an attractive, cost-effective mailing solution. Their slim profile helps maximise postage savings while keeping contents secure throughout delivery, making them perfect for Royal Mail, courier and postal services.
Features:
- Premium UK manufactured 0427 style die cut postal boxes
- Designed for Royal Mail Large Letter postal system
- Strong single wall corrugated cardboard construction
- Fold-over ends with secure earlock lid for quick assembly
- No tape required for box construction
- Available in Brown or White finish
- Ideal for documents, books, stationery, photographs and online orders
- Perfect for eCommerce, offices, retailers and home businesses
Product Specifications:
- Material: Single Wall Corrugated Cardboard
- Style: 0427 Die Cut Postal Box
- Colours Available: Brown or White
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Sizes Available:
- C6: Internal 160 x 110 x 20mm | External 166 x 114 x 22mm
- C5: Internal 222 x 160 x 20mm | External 228 x 164 x 22mm
- C4: Internal 332 x 245 x 22mm | External 332 x 245 x 24mm (Maximum Royal Mail Large Letter Size)
- Available Pack Sizes: 5, 10, 25, 50, 100, 200 & 500 Boxes (varies by size)
Whether you're posting documents, books, photographs, media products or online orders, these Royal Mail Large Letter Die Cut Postal Boxes provide a strong, lightweight and professional packaging solution while helping maximise Royal Mail Large Letter postage savings.
Frequently Asked Questions
What is a Royal Mail 'large letter' PIP box?
A PIP (Pricing in Proportion) box is a die cut cardboard box designed to fit Royal Mail's "large letter" postal category, helping keep contents flat and protected while qualifying for large letter postage rates rather than the more expensive parcel rate. Our C4, C5, and C6 sizes are specifically designed to meet Royal Mail's size guidelines.
What's the difference between C4, C5, and C6 die cut boxes?
The sizing follows standard envelope dimensions — C6 is the smallest (160x110x20mm internal), C5 is mid-sized (222x160x20mm internal), and C4 is the largest (332x245x22mm internal), which is also the maximum size Royal Mail allows for their large letter postal rate.
How do I assemble a die cut postal box?
Our die cut boxes are designed for quick, tool-free assembly with fold-over ends and an "earlock" lid mechanism, making them fast to pack for mail order and eCommerce dispatch without needing tape to close.
What sizes do brown and white die cut boxes come in?
Beyond the Royal Mail PIP sizes, our brown and white die cut boxes are available in a full range of sizes from 5x4x3" up to 17x13x6", giving you options for anything from small accessories to larger, bulkier postal items.
Can I buy die cut boxes in bulk for my mail order business?
Yes, our die cut boxes are available in pack sizes from 5 up to 500 boxes, making them a cost-effective packaging solution for mail order companies and eCommerce businesses with regular postal shipping needs.
