Staedtler
12 in. Ring Binder Ruler

The Staedtler Ring Binder Ruler is designed to fit easily inside a notebook binder. It’s made of shatterproof plastic and includes a convenient hanging hole for easy storage.

The ruler is 12 in. long and 1 1/4 in. wide. Its transparent blue edges are ruled in 1/16 in. increments on one side of the ruler and in millimeters on the other.