Material: 316L titanium steel, waterproof and rustproof, not allergy, no fading Color: Silver, Black Width: 4 mm Weight: 5g PLEASE SEE THE SIZE IN THE DESCRIPTION WHEN BOOKING / CHECKOUT: Size: 4 / 14.75 / Finger circumference: 4.6-4.8 Size: 5 / 15.5 / Finger circumference: 4.8-5.2 Size: 6 / 16.5 / Finger circumference: 5.4-5.6 Size: 7 / 17.5 / Finger circumference: 6-6.4 Size: 8/18 / Finger circumference: 6.4 - 6.7 Size: 9/19 / Finger circumference: 6.7 - 7.1 Size: 10/20 / Finger circle: 7.1 - 7.4