925 heavy curb chain ring. Ideal for both male and female. The ring is flexible which allows for a comfortable fit. Heavy duty chain which makes a real statement. Each link measures 8mm x 7mm x 2mm. Available in small (6.5cm circumference) Medium (7cm circumference ) Large (7.5cm circumference ) Contact us if you would like another size can be made smaller or bigger in measurements of 5cm.