The ring measures a standard UK mans size "U". It can be adjusted to "U 1/2 or V only. The ring band measures approximately 6mm x 1-2mm.
1. Ring size comparison in different countries (Conversion Table)
2. How to measure your finger size and how to find the right ring size?
Please print this Sizing Tool(click). You have two choices with this tool. The first, please put your existing ring onto the circles and find your size. Alternatively, scissor out the measuring bar on the right of the paper and use it to measure your finger size. Please follow the instructions in the above PDF document. We recommend that you can use both two methods to make the result more accurate.
Hopefully you learned not only why this was occurring but also how to prevent it in the future