A4 size cardboard postal box features
- Will fit through a standard UK letterbox.
- Post with confidence - meets Royal Mail's 'Large Letter' category
- Economical postage solution to help you save on postage costs.
- Simple-to-use flatpack design - just fold, tuck and pack.
- Cardboard box offers lightweight but strong postage solution.
- Perfect for books, picture frames and other flat items.
- Supplied in packs of 50 flatpack boxes.
- Quick and simple to fold into shape.
- Eco-friendly boxes that can be reused and recycled.
A4 size cardboard postal box - internal dimensions
- Internal length: 320mm (13")
- Internal width: 230mm (9")
- Internal height: 20mm (1")
A4 size cardboard postal box - external dimensions
- External length: 338mm (13")
- External width: 235mm (9")
- External height: 22mm (1")
- Pack quantity: 50 boxes
Please note: Imperial sizes provided to the nearest inch.
A4 size cardboard postal box - packing warning
This cardboard box will expand slightly beyond the stated dimensions, but please ensure it is not over-filled.
The box is designed so that its external dimensions fit Royal Mail's 'Large Letter' guidelines.
If the box is over-filled, Polybags is not responsible for any extra postal charges issued.
A4 size cardboard postal box - how to dispose
Constructed from environmentally friendly, 100% recyclable cardboard, this box is designed for hassle-free collection in regular curbside pickups or at recycling centers.
Check out our user-friendly recycling locator tool for information on recycling facilities in your local area.
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