Need a better way to measure your beads, rather than the eyeballing technique? This is a wonderful tool (and you should check out the digital caliper first though), that will
This 80mm brass gauge is identical to higher-end European models but less expensive. The quality is great, and time savings of not having to guess on a ruler is well worth the price! We use calipers quite a bit to determine bead sizes, and then can accurately figure out how many beads you need to get a certain length in a project.
Made of solid brass and features notched jaws for inside/outside measurements as well as a 1/10th millimeter vernier gauge. Click on the link to read more about the Vernier caliper!