What our customers are saying...

Great quality, great prices, great service. Couldn't ask for anything more!

Dani, Surrey

I've been buying from Challenge for years and they've never let me down.

Roger, London

Really great service and an extremely helpful team on the phone. Highly recommended.

Nikki, Kent

Great to hear such passion and excitement about a cardboard box! Keep up the great work.

Olly, Guildford

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Brown Postal Boxes

We have a nice collection of Royal Mail Pricing in Proportion (PIP) Boxes.


Each of these boxes are suitable for sending within the Royal Mail Large Letter pricing band. Each PIP box is made from full recycled single wall corrugated board, with an incorporated closing flap.


Our PIP boxes are delivered flat in packs making them an excellent solution for anyone wishing to post using Royal Mail.

Product CodeDimensionsRoyal Mail SizeColourPack QtyPrice PerQty
50+100+400+800+1,600+
ASCDBKRA6
179mm x 131mm x 55mm BrownDiecuts1000220198176154132
Diecuts
ASCDBKRA5
240mm x 180mm x 55mm BrownDiecuts1000290261232203174
Diecuts
ASCDBKRA4
323mm x 229mm x 55mm BrownDiecuts1000360324288252216
Diecuts