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Ring Sizing Guide
How to Measure Your Ring Size
Finding your ring size at home is simple and takes just a few minutes. This guide covers three reliable methods, a full international size chart, and expert tips to ensure a perfect fit.
3 Methods
5 min to Measure
Getting Started
Choose a Measuring Method
There are several ways to find your ring size at home. Pick whichever method suits what you have available.
01
Paper Strip Method
Cut a thin strip of paper, wrap it snugly around the base of your finger, mark the overlap, and measure the length in millimetres—the most reliable at-home approach.
Most Accurate
02
Measure an Existing Ring
Place a well-fitting ring flat on a ruler and measure the inner diameter in millimetres from edge to edge. Match the measurement to the conversion chart below.
03
String Method
Wrap a piece of string or dental floss around your finger, mark where it meets, then lay it flat against a ruler and measure the circumference in millimetres.
Step-by-Step
Paper Strip Instructions
The paper strip method gives the most accurate at-home result. Follow these five steps carefully.
The Formula
Length (mm) ÷ π = Diameter (mm)
e.g. 52mm ÷ 3.14 = 16.5mm diameter → UK L½ / US 6
International Sizing
Ring Size Conversion Chart
Match your measurement below. US sizes 6 and 7 are the most common women's sizes. If you fall between two sizes, always choose the larger for comfort.
| US / Canada | UK / Australia | EU / French | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 3 | F | 44 | 14.1 | 44.2 |
| 3½ | G | 45½ | 14.5 | 45.5 |
| 4 | H | 47 | 14.9 | 46.8 |
| 4½ | I | 48 | 15.3 | 48.0 |
| 5 | J½ | 49 | 15.7 | 49.3 |
| 5½ | K½ | 50½ | 16.1 | 50.6 |
| 6 | L½ Popular | 52 | 16.5 | 51.9 |
| 6½ | M½ | 53 | 16.9 | 53.1 |
| 7 | N½ Popular | 54½ | 17.3 | 54.4 |
| 7½ | O½ | 55½ | 17.7 | 55.7 |
| 8 | P½ | 57 | 18.1 | 57.0 |
| 8½ | Q½ | 58 | 18.5 | 58.3 |
| 9 | R½ | 59½ | 18.9 | 59.5 |
| 9½ | S½ | 61 | 19.4 | 60.8 |
| 10 | T½ | 62 | 19.8 | 62.1 |
| 10½ | U½ | 63 | 20.2 | 63.4 |
| 11 | V½ | 64½ | 20.6 | 64.7 |
| 11½ | W½ | 66 | 21.0 | 66.0 |
| 12 | X½ | 67 | 21.4 | 67.2 |
Conversions are close approximations — sizing systems do not align perfectly across regions. EU size = inner circumference in mm. If you are between sizes, always size up. Diameter × 3.14 = circumference.
Expert Advice
Tips for an Accurate Fit
Small factors can shift your ring size by half a size or more. Keep these guidelines in mind for the most reliable result.
01
Measure at End of Day
Fingers swell throughout the day and are at their largest in the evening. Measuring then ensures the ring will remain comfortable at all times of day.
02
Temperature Affects Size
Cold hands can be up to a full size smaller. Always measure when your hands are warm and relaxed — not immediately after coming in from cold weather.
03
Wide Bands Fit Tighter
Rings wider than 6mm cover more skin surface and feel tighter. If you are choosing a wide band, consider going up half a size from your standard measured size.
04
Measure Multiple Times
Take measurements on three different days at different times of day. Average the results to arrive at the most reliable size before confirming your order.
05
Account for Your Knuckle
If your knuckle is noticeably larger than the base of your finger, size toward the knuckle. A well-fitting ring should slide on with gentle resistance, then sit snugly.
06
When in Doubt, Size Up
Choosing between two sizes? Always go with the larger. A ring that is slightly too large can be resized by any jeweller; a ring too small cannot be worn until adjusted.
Still Unsure of Your Size?
Our team is happy to help. Reach out with your measurements and we'll guide you to the perfect fit before you place your order.
