THESE FLAT BOXES MEET THE ROYAL MAIL LARGE LETTER 25MM CRITERIA
Description: Manufactured from single wall E flute corrugated board, with a kraft finish. Two shaped tabs that slot-lock into the 20mm side of the box for final closure. All delivered flat packed for easy space saving storage.
Size: 333x123x20mm (13.1×4.8×0.8″) – LARGE LETTER MAX. SKINNY
L x W x H (internal dimensions)
Usage: For transportation of goods in the postal system within Royal Mail PIP limitations.