Ring Size Guide
Ring Size Guide: How to Measure and International Size Conversions
How to Measure Your Ring Size
Method 1: Using an Existing Ring
- Place your ring on a flat surface
- Use a ruler or calliper to measure the inside diameter in millimetres
- Measure from edge to edge across the widest part of the inner circle
- For most accurate results, measure the diameter at several points
- Use the diameter measurement to find your size in the conversion chart below
String or Paper Strip Method (circumference)
- Get a piece of string or strip of paper about 6 inches (15 cm) long
- Wrap it around your finger where you would wear the ring
- Mark where the string or paper overlaps with a pen
- Measure the length from the start to your mark with a ruler in millimetres
- Use the measurement to find your size in the conversion chart below
Tips for Accurate Measurement
- Measure at the end of the day when your fingers are at their largest
- Don't measure when you're cold (fingers shrink) or very hot (fingers swell)
- Make sure the measuring tool is snug but not tight
- Measure 3-4 times to ensure consistency
- Consider wider rings may need 0.5 size larger than thin rings
- Account for knuckle size when measuring
| US/Canada | UK/AU | EU | Circumference (mm) | Diameter (mm) |
|---|---|---|---|---|
| 3 | F | 44 | 44.2 | 14.1 |
| 3.5 | G | 45 | 45.5 | 14.5 |
| 4 | H | 47 | 46.8 | 14.9 |
| 4.5 | I | 48 | 48.0 | 15.3 |
| 5 | J | 49 | 49.3 | 15.7 |
| 5.5 | K | 50 | 50.6 | 16.1 |
| 6 | L | 52 | 51.9 | 16.5 |
| 6.5 | M | 53 | 53.1 | 16.9 |
| 7 | N | 54 | 54.4 | 17.3 |
| 7.5 | O | 55 | 55.7 | 17.7 |
| 8 | P | 57 | 57.0 | 18.1 |
| 8.5 | Q | 58 | 58.3 | 18.5 |
| 9 | R | 59 | 59.5 | 18.9 |
| 9.5 | S | 61 | 60.8 | 19.3 |
| 10 | T | 62 | 62.1 | 19.7 |
| 10.5 | U | 63 | 63.4 | 20.2 |
| 11 | V | 65 | 64.6 | 20.6 |
| 11.5 | W | 66 | 65.9 | 21.0 |
| 12 | X | 67 | 67.2 | 21.4 |
| 13 | Z | 69 | 69.7 | 22.2 |
Special Considerations
Width Adjustment
For rings wider than 6mm, consider going up 0.5 size:
- 6-8mm wide: +0.5 size
- 8mm+ wide: +1 size
Temperature Effects
- Cold weather can reduce finger size by up to 1 full size
- Hot weather can increase finger size by up to 1 full size
- Measure in normal room temperature for best results
Common Ring Sizes
- Women: Most common sizes range from 5-7
- Men: Most common sizes range from 8-10
- Remember these are just averages; individual sizes vary greatly
Care Tips for Proper Fit
- Ring should slide over knuckle with slight resistance
- Should twist slightly on finger with some effort
- Should not leave deep marks when removed
- Should not slide off when hands are wet or cold
- Should not feel tight when hands are warm