Schoolsupplies New 6inch 150mm Plastic Ruler Sliding Gauge Vernier Caliper Jewelry Measuring Precision measuring instrument for delicate items - essential tool for jewelers, Precision sliding gague measures up to 6" (150mm) in increments of 1/16" (1mm) Scale marked in Centimeter,Vernier Design will measure inside and outside of object Overall Length: 20.9 cm / 8.23" (Approx.),Width:7.2 cm / 2.83" (Approx.) Quantity: 1 piece, Color: Color will send randomly, hope you can understand.