Postal Packaging Brown Boxes - Pip -Postage in Proportion

Specially designed to conform to Royal Mail's Postage in Proportion Guidelines (PIP).
These boxes will fit comfortably through the maximum 25mm slot to reduce your postage costs & qualify for Large Letter rates,rather than packet rates - subject to Maximum weight of 750g.
Made from lightweight recycled carboard, they will also protect your items in transit.
Supplied flat , easy fold to assemble.
Available in 2 Sizes A4 - External 315 x 225 x 23mm
Internal 310 x 220 x 18mm
A4 Maxi - External 350 x 245 x 23mm
Internal 345 x 240 x 18mm