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Your private jewellerimagine it, we do the rest
Three simple methods to estimate your ring size, including the bank-card method.
Calibrate your screen with a bank card, then place your ring against it to find your size.
Place a bank card against your screen and adjust the rectangle until it matches the card's size exactly.
Drag to adjust the size
A practical technique using a familiar everyday object.
Take a standard bank card (85.6 mm × 53.98 mm)
Wrap a strip of paper around your finger
Mark the meeting point and measure against the card
The short side of the card = 54 mm ≈ size 54
BANK CARD
•••• •••• •••• ••••
Width
54 mm
≈ Size 54
The classic technique with a tape or string.
Cut a paper strip 1 cm wide
Wrap it around the base of your finger
Mark where the paper overlaps
Measure the length in mm = your French size
Example: If the strip measures 52 mm, your French ring size is 52.
If you already have a ring that fits well.
Take a ring that fits the intended finger
Measure its inner diameter in mm
Refer to the chart below
Tip: Place the ring on graph paper for a more precise measurement.
| FR size | US size | UK size | Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 44 | 3 | F | 14.0 | 44 |
| 46 | 3.75 | G½ | 14.6 | 46 |
| 48 | 4.5 | I | 15.3 | 48 |
| 50 | 5.25 | J½ | 15.9 | 50 |
| 52 | 6 | L | 16.5 | 52 |
| 54 | 6.75 | M½ | 17.2 | 54 |
| 56 | 7.5 | O | 17.8 | 56 |
| 58 | 8.25 | P½ | 18.5 | 58 |
| 60 | 9 | R | 19.1 | 60 |
| 62 | 10 | S½ | 19.7 | 62 |
| 64 | 10.75 | U | 20.4 | 64 |
| 66 | 11.5 | V½ | 21.0 | 66 |
These methods give an initial indication. The jewellery’s shape and width affect comfort. Confirm your size with your jeweller during the study, before requesting manufacturing.
Request a free measuring guide and speak to your jeweller to confirm the right size for your project.
Request my measuring guide