Originally made to fit an American Fender Stratocaster. The knob fits the standard 6mm slit splined potentiometer shaft. Made with a bone colored casting resin and antiqued with an oil based black paint (both made in USA).
The hole is reamed to 15/64 (5.95mm) to fit 6mm splined shaft. BawdyPartz also mades these with 1/4″ hole and set screw for a more universal fit.
11/16″ Base to Forehead
1-1/4″ Chin to Crown
3/4″ Cheek to Cheek