SIZING
Blue Serpent Sizing Guide
Finding the right size begins with presence.
A well-fitting ring doesn’t just sit on your hand - it moves with you, becomes part of you. Use this guide to discover your fit.
MEASURING YOUR SIZE
OPTION 1 — USE A RING YOU OWN
[Most accurate DIY method]
Grab a ring that fits the desired finger.
Measure the inner diameter in mm and match it to our size chart.
If possible, use a calliper for precision.
OPTION 2 — STRING METHOD
Wrap a string around your finger.
Mark where it overlaps and measure the length in mm.
Match it to the chart.
OPTION 3 — LOCAL JEWELLER
[Most accurate overall]
Visit a jeweller for a quick measurement.
Takes seconds and removes all guesswork.
TIPS FOR ACCURACY
- Measure at the end of the day
- Avoid measuring cold fingers
- Consider your knuckle size
- Between sizes → size up for thicker rings
- Fingers vary between hands
How to Measure Your Ring Size
METHOD 1: Circumference (String or Paper)
- Cut a thin strip of paper or use a soft string.
- Wrap it gently around the base of your finger - snug, with space to breathe.
- Mark where the ends meet.
- Measure the length in millimeters or inches. This is your finger’s circumference.
METHOD 2: Diameter (Using a Ring You Own)
- Choose a ring that fits the same finger.
- Measure the inner diameter across its widest point, in millimeters or inches.
- Use the size chart below to match your measurement to the right fit.
Ring Size Chart
| Option 1 | Option 2 | |||
| US Size | Circumference (mm) | Circumference (inches) | Diameter (mm) | Diameter (inches) |
| 5.5 | 50.5 | 1.99 | 16.1 | 0.63 |
| 6.5 | 53.1 | 2.09 | 16.9 | 0.67 |
| 7.5 | 55.3 | 2.18 | 17.6 | 0.69 |
| 8.5 | 57.9 | 2.28 | 18.3 | 0.72 |
| 9.5 | 60.5 | 2.38 | 19 | 0.75 |
| 10.5 | 63 | 2.48 | 19.7 | 0.78 |
| 11.5 | 65.6 | 2.58 | 20.4 | 0.8 |
Tips for Measuring
- Measure your fingers at the end of the day, when they feel most natural and at ease.
- Cold hands may give you a smaller reading - let them warm before measuring.
- If you're between sizes, lean toward the larger one. A little space allows the piece to move with you.
FIND YOUR LENGTH (FOR NECKLACES OR BRACELETS)
Use a string, cord, or chain to see how the piece will sit on your body.
HOW TO MEASURE
- Place a string around your neck or wrist
- Adjust to your desired length
- Measure the string in cm
NECKLACES
CM INCHES 50 19.7 55 21.7 60 23.6
BRACELETS
CM INCHES 15 5.9 17 6.7 19 7.6 21 8.4
