Let us create your brand on this new style circular ring. We use the medium plain sterling silver disc, which is the actual size of a nickel, on the top of the ring. The ring them tappers down to 4mm. We keep the back of the ring smooth and it's thickness around 3 to 4mm, so that it is comfortable when working with your hands. This is a newer style for us and really becoming more popular for both men and women.