RING SIZE CALCULATOR
Find Your Size
Measure your finger or an existing ring. We'll do the math.
Ring Size Calculator
How to measure:
- Circumference: Wrap a non-stretchy string or paper strip snugly around the base of your finger. Mark where it overlaps. Measure the length in mm or inches.
- Diameter: Take a ring that fits the intended finger well. Measure its internal diameter in mm or inches.
1. Select your measurement method:
2. Enter your measurement:
This calculator provides an estimated ring size. For the most accurate sizing, we recommend visiting a professional jeweler or ordering our Vinca Jewelry Ring Sizer tool. Finger size can fluctuate with temperature and time of day.
Prefer to DIY your way to the perfect size? Here are two easy methods:
Ring Size Chart
1. Use a Ring You Own
- Measure the internal diameter (in mm) of a ring that fits the desired finger.
- Enter the number into our calculator or match it with our chart below.
2. Use a String or Paper Strip
- Wrap a thin strip of paper or string around your finger.
- Mark where the ends meet.
- Measure the length in mm and input it into our calculator.
| US Size | UK Size | Internal Diameter (mm) | Finger Circumference (mm) |
|---|---|---|---|
| 4 | H½ | 14.9 | 46.8 |
| 5 | J½ | 15.7 | 49.3 |
| 6 | L½ | 16.5 | 51.8 |
| 7 | N½ | 17.3 | 54.4 |
| 8 | P½ | 18.1 | 57.0 |
| 9 | R½ | 19.0 | 59.5 |
| 10 | T½ | 19.8 | 62.1 |
| 11 | V½ | 20.6 | 64.6 |
| 12 | X½ | 21.4 | 67.2 |
Pro Tips for the Perfect Ring Fit
Getting your ring size just right can make all the difference in comfort and style. Here are some tried-and-true sizing tips to help you get the most accurate fit—especially useful when using our online ring size calculator:
Measure 2–3 times
Fingers change size throughout the day. Average your results.
Account for knuckles
If your knuckle is larger than the base of your finger, size up ½ size.
Wide bands run tight
Bands 5mm or wider should go up ½ size.
Avoid cold hands
Measure when warm—cold fingers shrink.
Use a ring you own
Measure the inner diameter of a ring that already fits well.
Browse our collection or visit us for a professional fitting.
FAQs About Ring Sizing
You enter either your finger’s circumference or the diameter of an existing ring. The calculator instantly matches your input to the closest US ring size.
Yes! As long as your measurement is accurate, our tool provides a reliable US ring size. For extra certainty, we also suggest using our printable guide or professional sizing.
No worries—we offer easy exchanges. If your ring doesn’t fit, contact us within 14 days for a hassle-free swap.
Yes! Many Vinca ring designs come in half sizes. Check each product page for available options.
Size 7 is the most common women’s ring size and a good starting point. You can also sneakily borrow one of their rings and measure it for accuracy.