Your Jewelry Stfery jewelry is minimal and made for everyday wear. Our designs are timeless and complement any style without overpowering it—because there is beauty in simplicity.For a timeless and chic piece that will last you a lifetime, choose Stfery. Product Size: Size 6: The inner circumference is about 51.9mm, the inner diameter is about 16.5mm, and the error is about 1mmSize 7: The inner circumference is about 54.4mm, the inner diameter is about 17.3mm, the error is about 1mmSize 8: The inner circumference is about 57mm, the inner diameter is about 18.1mm, the error is about 1mmSize 9: The inner circumference is about 59.5mm, the inner diameter is about 18.9mm, the error is about 1mmSize 10: The inner circumference is about 62.1mm, the inner diameter is about 19.8mm, the error is about 1mm Jewelry maintenance: 1. Gently, avoid collisions and friction.2. Avoid contact with high temperatures and acid, alkali solution.3. It can be easily removed when bathing or swimming. Jewelry wearing precautions ♥ Avoid acid and alkali and humid environment♡ Avoid contact with chemicals♥ Avoid wearing for a long time♡ Avoid from impact and hard object rubbing♥ Avoid children playing and prevent accidental swallowing♡ Avoid wearing when bathing or sweating