Body Jewelry Piercings Gauge Measurement Wheel, Black Acrylic - MM & Gauges - Pierced Owl Go to amazon.com Related posts The 11 best measurements tools 2022 FeatureBlack Acrylic Gauge Measurement WheelTwo sided, Millimeter & Gauge Measurment Tool.Gauge Measures 18G. ~ 3/4"Millimeter Measures 1.0mm ~ 19mm DescriptionThis acrylic gauge wheel is two sided. 18g to 3/4" on one side, and 1mm to 19mm on the other side. The gauge wheel is approximately 3-1/2" in diameter, and 1/8" thick.