International Ring Size Conversion Chart
Use this comprehensive chart to find your ring size across different sizing systems worldwide. Locate your measurement in the diameter or circumference column in millimeters, then read across to find your size in US, UK/AU, and EU standards.
|
US Size |
UK Size |
EU Size |
Diameter |
Circumference |
|
4 |
H½ |
47 |
14.9 mm |
46.8 mm |
|
4.5 |
I½ |
48 |
15.3 mm |
48.0 mm |
|
5 |
J½ |
49 |
15.7 mm |
49.3 mm |
|
5.5 |
K½ |
50 |
16.1 mm |
50.6 mm |
|
6 |
L½ |
52 |
16.5 mm |
51.9 mm |
|
6.5 |
M½ |
53 |
16.9 mm |
53.1 mm |
|
7 |
N½ |
54 |
17.3 mm |
54.4 mm |
|
7.5 |
O½ |
56 |
17.7 mm |
55.7 mm |
|
8 |
P½ |
57 |
18.1 mm |
57.0 mm |
|
8.5 |
Q½ |
58 |
18.5 mm |
58.3 mm |
|
9 |
R½ |
60 |
18.9 mm |
59.5 mm |
|
9.5 |
S½ |
61 |
19.4 mm |
60.8 mm |
|
10 |
T½ |
62 |
19.8 mm |
62.1 mm |
|
10.5 |
U½ |
64 |
20.2 mm |
63.4 mm |
|
11 |
V½ |
65 |
20.6 mm |
64.6 mm |
|
11.5 |
W½ |
66 |
21.0 mm |
65.9 mm |
|
12 |
X½ |
68 |
21.4 mm |
67.2 mm |
|
13 |
Z½ |
70 |
22.2 mm |
69.7 mm |
How to use this chart:
- If you measured your ring's inner diameter, find that measurement in column 4
- If you measured your ring's circumference, find that measurement in column 5
- Read across the row to find your size in US, UK/AU, and EU standards
- If your measurement falls between two sizes, refer to our Expert Tips section for guidance
Need Help with Your Ring Size?
Finding the perfect ring size is essential to your complete satisfaction with your purchase. If you have any questions about sizing, need personalized assistance, or would like to discuss your specific requirements, our expert team is here to help.
We offer complimentary sizing consultations and can provide detailed guidance based on your individual needs, hand characteristics, and style preferences. Whether you're unsure about your measurement, concerned about band width, or have questions about resizing options, don't hesitate to reach out.
Remember: Proper ring sizing ensures not only comfort but also the longevity and beauty of your precious jewelry. Take your time with the measurement process, and trust our team to help you find the perfect fit. Your satisfaction is our priority.
Expert Tips for Perfect Ring Sizing
When You're Between Sizes
If your measurement falls between two sizes, we recommend choosing the larger size. A ring that is slightly loose is more comfortable to wear and allows for natural fluctuations in finger size throughout the day. You can always have a ring professionally resized if it becomes too loose over time, but a ring that is too tight can be uncomfortable and difficult to remove.
Wider Bands Fit More Snugly
The width of your ring band affects how snugly it fits. Wider bands (4mm or wider) fit more snugly than thin, delicate bands because they cover more surface area on your finger. If you're purchasing a wide band ring, consider sizing up by half a size for optimal comfort. Conversely, thin bands may feel slightly looser at the same size, so you might prefer to size down by half a size if you prefer a snug fit.
Temperature and Time of Day
Remember that fingers change size with temperature and time of day. Fingers are typically larger in warm weather and smaller in cold weather. If you live in a climate with significant seasonal temperature variations, choose a size that works for your most common conditions. For those who experience cold winters, you may find your ring fits differently in summer versus winter.
The Knuckle Factor
Your knuckle is often larger than the base of your finger, so your ring must fit comfortably over your knuckle while remaining snug at the base. When trying on a ring, ensure it slides over your knuckle with slight resistance but doesn't feel tight or pinched. Once on your finger, it should sit comfortably at the base without spinning or sliding excessively. If your knuckle is significantly larger than your finger base, you may need to size up to accommodate this difference.
The Comfort Test
A properly sized ring should:
- Slide on with slight resistance
- Sit comfortably at the base of your finger
- Allow you to move it slightly side to side
- Not spin freely or feel loose
- Be removable without excessive force
If you experience any discomfort, difficulty removing the ring, or if it spins excessively, it may not be the right size for you.
How to Measure
Method 1: Using an Existing Ring
This is the most accurate method if you have a ring that fits perfectly on the intended finger.
- Select a ring that fits comfortably on the finger where you plan to wear your new ring.
- Place the ring on a flat surface and measure the inside diameter across the widest point using a ruler or measuring tape.
- Measure in millimeters for maximum precision.
- Record your measurement and refer to the International Size Chart above to determine your ring size.
- Repeat the measurement 2-3 times and average the results for accuracy.
Method 2: Using String or Paper Strip
This method works well if you don't have a ring available to measure.
- Wrap a piece of string, paper strip, or flexible measuring tape snugly around the base of your finger where you'll wear the ring.
- The fit should be comfortable but not tight—you should be able to move it slightly side to side.
- Mark where the string overlaps with a pen or pencil.
- Lay the string flat on a ruler and measure the length in millimeters. This measurement represents your finger's circumference.
- Use the International Size Chart above to convert your circumference measurement to a ring size.
- Repeat this process 2-3 times and average your results for the most accurate sizing.
Pro Tip: For the most reliable measurement, use both methods and compare your results. If they differ, average the two measurements.
Best Time to Measure
Accurate ring sizing begins with measuring at the optimal time. Your finger size naturally fluctuates throughout the day and in response to temperature changes. Follow these guidelines for the most accurate measurement:
- Measure at the end of the day — Fingers are naturally at their largest in the evening when they are warmest and have had time to expand slightly from daily activity.
- Avoid measuring when hands are cold — Cold temperatures cause blood vessels to constrict, making fingers noticeably smaller. Never measure immediately after being outside in cold weather or after handling cold items.
- Take multiple measurements — Measure your finger at least three times and average the results to ensure accuracy and account for natural variations.
- Measure the correct finger — Always measure the specific finger you plan to wear the ring on. Fingers on your dominant hand are often slightly larger than those on your non-dominant hand.
- Consider your lifestyle — If you spend significant time in warm or cold environments, measure during conditions that reflect your typical day.
Conclusion
Finding the right ring size is essential to ensuring comfort and longevity for any piece you wear. Whether you're measuring at home with our printable guide, visiting a jeweler for professional sizing, or considering factors like finger shape and ring width, taking the time to get an accurate measurement will help you enjoy your jewelry for years to come.
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