Golden Ratio Caliper
The Golden Ratio Caliper is used to measure the Golden Ratio at any scale. The distance between arms 1 and 2 is always 1.618 times the distance between arms 2 and 3. Also included is a detachable, additional bisecting arm.
Can be used by designers, artists, architects, beauticians, and curious individuals to ensure a ratio of exactly 1 to 1.618.