Royal Mail Large Letter PiP Box (10)
These boxes are specially designed for Royal Mail’s Pricing in Proportion (PiP) regulations and can save you an absolute fortune on postage.
They allow you to post items as large letters rather than small packets thus avoiding additional expense.
Made from fluted corrugated cardboard, white outside and brown inside, approx 1.5 mm thick
Comes packed flat and pre-creased for easy assembly as required
Large letter size cardboard postal boxes PIP
Will easily fit through large letter slot.
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