We’ve made it easy for you to correctly measure a closure and bottle with our printable cap and bottle neck finish reference gauge.
Once you have the gauge cut out, use the following instructions for an accurate measurement:
Cap or closer diameter: Place the gauge across the underside of the cap/closure with the notch flush against the inner wall. Then read to opposite inner wall of the cap/closure. See picture on gauge for visual.
Bottle neck finish: Place the gauge across the finish with the hook tight against the thread of the bottle. Read to the outer edge of thread on opposite side of finish. See picture on gauge for visual.