3cm Ruler Keychain

This isn’t just a keyring - it’s your personal humble brag. A tiny ruler that says you measure things precisely, just enough to keep chaos in check. Perfect for misfits who know that sometimes, details matter... even if only 3 cm of them.

Materials: 3 cm PLA ruler, 3D‑printed with charming layer lines

Variants: Also available in INCH version

Hand‑printed and assembled in Sussex

Ships next working day | Free UK delivery on orders over £30

Say goodbye to “just guessing” and hello to micro-precision for your keys.