Ring Size Guide
Here are three potential methods for choosing the best ring size:
- Ask your local jeweller to measure your finger using a professional ring sizer. This is the most accurate method, and our first recommendation.
- Measure an existing ring that is worn on the same finger that the new ring will be worn on. Lay a ruler down on a flat surface and place the existing ring on top to measure the inside diameter. Then refer to the guide below to find out the closest matching ring size.
- Measure the inside circumference by cutting a small strip of paper that is approximately the same width as the band on your desired ring. Wrap the paper strip comfortably around your finger where you’ll wear the ring, then use a pencil to mark where the end of the paper strip wraps around onto itself. Lay the paper strip down flat and measure with a ruler from the end of the paper until the mark you made to see the circumference of your finger, (then compare to the chart below). – This method is the most likely to make a mistake, so if this is your only option, we suggest trying it multiple times at different times of the day.
Your ring should feel comfortable to wear, allowing for factors which may change the size of your hands slightly, such as the weather/humidity or time of day. Try measuring your finger at different times of the day, then choose a ring size that will feel comfortable at both the times.
International Ring Size Comparison
If your desired ring size is in between two of our standard available sizes, we recommend you pick up to one size bigger if the ring you’re purchasing has a wide band, otherwise, try picking the closest available size for rings that have a normal or narrow band. To enquire about ring resizing or for more advice on choosing the perfect ring size, please contact us.
|Black Matter Sizing||Circumference (mm)||Diameter (mm)||USA / Canada||UK / Australia||Japan / South America||Switzerland / Spain|
|I (15.3 mm)||48.0||15.3||4-1/2||I||8|
|J (15.5 mm)||48.7||15.5||J||9|
|K (15.9 mm)||50.0||15.9||K||10|
|L (16.3 mm)||51.2||16.3||L||11-3/4|
|M (16.7 mm)||52.5||16.7||M||12|
|N (17.1 mm)||53.8||17.1||N|
|O (17.5 mm)||55.1||17.5||O|
|P (17.9 mm)||56.3||17.9||P|
|Q (18.3 mm)||57.6||18.3||Q|
|R (18.8 mm)||58.9||18.8||R||19|
|S (19.2 mm)||60.2||19.2||S||20-1/4|
|T (19.6 mm)||61.4||19.6||T||21-1/2|
|U (20.0 mm)||62.7||20.0||U||21|
|V (20.4 mm)||64.0||20.4||V|
|W (20.8 mm)||65.3||20.8||W||25|
|X (21.2 mm)||66.6||21.2||X|
|Y (21.6 mm)||67.8||21.6||Y|
|Z (21.8 mm)||68.5||21.8||12-1/2||Z||26||28-3/4|
|70.4||22.4||Z + 1|
Please note that while we try to ensure we always provide accurate and up to date information, we can’t guarantee to not make mistakes, so if you spot something that’s not quite right, please let us know! Contact us.