3" White Vernier Caliper Plastic Measuring Tool For Finished Beadwork, Basics Our 3" Vernier Caliper measuring tool provides you with the accurate measurements you need to display your finished beadwork creations. Crafty jewelers will appreciate the convenience of this plastic measuring tool - perfectly suited for describing earrings with precision. It can help level up your beadwork game by sizing up your finished products or designing your beadwork. One other use is to measure the ear piecing hold on earlobes to ensure a perfect fit! One 3" Caliper