Review on Accurate US Plastic Ring Sizer Tools for Precise Ring Measurement: 2PCS Finger Sizer Tool Kit with Ring Gauge & Measuring Tool by Carol Miller

I ordered them to send to customers to check ring size. They are made of very soft plastic (like TPU) with no burrs. It doesn't leave any scratches or anything like that. I find them accurate but a little difficult to read. The dashes for the numbers don't line up perfectly. But they line up close enough that you know what size you need. Although they work like zip ties, they can easily come loose if someone pulls too hard. They snap well into place, but can also be easily opened or trimmed if necessary. I will definitely buy them again.