Choosing the right ring size can quickly become a headache. There's nothing more frustrating than receiving a beautiful ring... that doesn't fit! This article will guide you step by step through understanding ring sizing systems, how different countries correspond, and how to ensure you always get the right size.
Thanks to our table of international equivalences and our tips, you can make your choice with complete peace of mind.

Measuring your ring size yourself: How to do it right?
1. Use an existing ring
If you already have a ring that fits perfectly and want to buy a new one for the same finger, this method is ideal.
- Take the ring in question.
- Use a ruler to measure the inside diameter of the ring, which is the distance between the two furthest points inside the circle.
*Only measure the inside of the ring, not including the metal thickness! - Then refer to a conversion table to know the exact size of your ring based on this diameter.
2. Measure the circumference of your finger
If you don't have a reference ring, you can measure the circumference of your finger directly using a string, a strip of paper or a tape measure.
- Take a piece of string, a strip of paper or a thin, non-elastic ribbon.
- Wrap it around the finger where you want to wear the ring.
- Mark the point where the two ends meet.
- Measure the length of the string or ribbon with a ruler in millimeters to get the circumference of your finger.
- Refer to the conversion table which will tell you the corresponding ring size.
3. Use a ring sizer
A ring sizer is a very useful tool for accurately measuring ring size. It consists of a series of rings of different sizes.
- You can get a plastic or metal ring sizer from jewelry stores or online.
- Slide each ring from the ring sizer onto your finger until you find one that fits perfectly, without forcing or being too loose.
- Each ring in the ring sizer indicates the size that fits you best.
*Tip : If you are between two sizes, always choose the larger one, as it is easier to adjust a ring that is too large than the other way around.
Also consider that finger size varies throughout the day and with temperature.
It is therefore recommended to measure your ring size at room temperature to avoid errors.