✨Material: 100% Titanium Material. Hypoallergenic and nickel free, suitable for sensitive body, light weight and comfortable to wear. ✨Lot:PAIR For One Size,please check the right size by your requirements. ✨Size:1.2mm-10mm This model has a small size to a large size, and the size interval in the middle is relatively small, which is conducive to expanding ear holes. ✨100% SATISFACTION GUARANTEE - We offered 100% satisfaction promise. Welcome to contact us anytime if you have any product issue, we will answer you in 24 hours. Just simply return it for a full refund or exchange