925 sterling silver and 18 gauge (approx. 1mm thick). The width of the ring is 6mm. These beautiful rings are made with lots of TLC by me and are each hand made to order. =) Buy multiple and make it a stacker ring or wear it on its own. Please note each ring is sold individually. Since I make these to order please allow 3-5 business days to prepare. But I do try my best to complete in 1-3 business days. Xox