This lot consists of a 48 pc lot of 3.7mm (OD) solid raw brass jump rings. The wire is 22 gauge. These can be used for necklaces, earrings, bracelets, etc. They would be a great addition to your next jewelry project! I have placed a ruler in the photo to show scale. Each line on the ruler represents 1/16". Don't hesitate to e-mail me if you have any questions.