Working Metal Caliper Keychain. Actual Fob is about 2 3/4 Inches Long and About 1 Inches at Widest. Key Chain is about 5 Inches Long Total. Silver Color Metal. Measurement Markings on Calipher go from 1 Inches to 5 Inches. Back of Calipher Head shows conversion Chart. No Other Markings can be found. All Moving Parts work well.