Royal Mail Size Guide

Large letter, letter & large letter + letter size guides.
3mm, 10mm, 15mm thick wall and screw-hole variations.

Many of my designs are thin enough to be posted in a letter or large letter, I do this to make postage as cheap as possible. Designing to these requirements results in cheap, quick and convenient prints.

A collection of models that fit within letters or large letters: https://than.gs/c/57768

A simple quick print to check if your letters/large letters are the right size to post.

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Design by PILED3D on MakerWorld (license: BY-SA).