MATERIAL: It is made of white copper, use advanced electroplating technology and polishing technology, make it bright and not easy to fade. .SIZE: The ring is open, not completely closed, can be adjusted. Girl ring: about 17mm inner diameter, inner circumference about 51mm (Adjustable to 51mm-53mm) boy ring:about 18mm in diameter, inner circumference about 56mm (Adjustable to 56mm-58mm). .SYMBOL: His and Hers Promise Rings. Only you, only the moment, touching my heart. .Tips: Adjustable size is limited, please estimate your finger is whether suitable for wear as picture. Thank you .100% SATISFACTION GUARANTEED: We offer you 12-month quality warranty and friendly customer service. Any questions, feel free to contact us and we will find the right solution for you. .