LARGE SIZEThis lock bracelet is 16.5cm in circumference, fits 7 inch wrists.We recommend that you measure your wrist before buying to avoid it not fitting your wrist. LOCK KEY NECKLACE SPECIFICATIONSnecklace pendant size :18*23mm.chain lenght:50CM. COUPLE JEWELRY:Romantic symbolize that only your key will open up my heart lock.Best gifts for girlfriend and wife,daughter on valentines day, Christmas, birthday, wedding, anniversary. Never Give Up to Love You. It means you'll always be together forever. MATERIAL:High quality stainless steel,use Laser Cutting and Polishing Technique,anti-allergic, and are not easy to corrode, rust or be contaminated by water.can last longer than other jewelries.