Comprehensive ring sizing charts, interactive calculators, and expert measuring guides — all in one place.
Step by Step
There are several methods to measure your ring size at home. For the most accurate result, always measure your finger at the end of the day when fingers are at their largest, and check multiple times.
The most popular at-home method. All you need is a strip of paper, a pen, and a ruler.
Similar to the paper method but uses a piece of string or dental floss, which can wrap more closely around the finger.
If you already own a ring that fits the correct finger, you can measure it directly.
Print our ring sizer template at actual size (100% scale — do not scale to fit) for the most accurate at-home measurement.
Interactive Tool
Enter your measurement and we'll instantly convert it to all major sizing systems.
For rings wider than 6mm, consider going half a size up — wider bands feel tighter on the finger.
Enter your measurement above and click "Find My Ring Size"
Remember: For the most accurate result, measure your finger 2–3 times at different times of day. If between sizes, choose the larger size. Visit a local jeweller for professional sizing.
Complete Reference
The world's most comprehensive ring size chart — covering US, UK, EU, Japanese, Swiss, and metric measurements.
| US / Canada | UK / IRE / AUS | EU / French / German | Japan / China | Swiss | Diameter (mm) | Circumference (mm) |
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Global Sizing Systems
Different countries use different ring sizing systems. Here's what you need to know about each major system.
Expert Advice
Getting your ring size right avoids costly resizing. Follow these expert tips for the best result.
Measure your finger at the end of the day, when it is at its largest size. Fingers swell slightly during the day due to activity and warmth. Avoid measuring in the morning or when you've just woken up.
Cold temperatures cause fingers to shrink — measuring in winter or in an air-conditioned room can give a smaller reading. Warm your hands to room temperature before measuring for the most consistent result.
Your ring must pass over your knuckle to reach the base of your finger. If your knuckle is noticeably larger, measure both and choose a size between the two — this ensures the ring fits over the knuckle but doesn't spin freely at the base.
Wider bands (over 6mm) feel significantly tighter than slim bands of the same size. If you're buying a wide band, go half a size to a full size up from your normal ring size to ensure comfort.
Take three measurements on different days and at different times. If readings vary, use the largest measurement — it's far easier to adjust a slightly loose ring (with ring sizers or jeweller sizing) than one that's too tight.
Your dominant hand is typically slightly larger than your non-dominant hand. If you plan to wear the ring on your right hand (common in many European countries), measure that hand specifically rather than assuming symmetry.
Pregnancy, weight changes, and certain medications can significantly affect ring size. If you're pregnant, wait until after birth before buying new rings. Engagement rings can always be professionally resized later.
If you're between two sizes, always choose the larger one. A ring that's slightly too large can be easily fixed with inexpensive ring sizers, guards, or a simple jeweller visit. A ring that's too small may be uncomfortable or even impossible to remove.
For important purchases — especially engagement rings and wedding bands — visit a local jeweller for professional sizing. It's free, takes under a minute, and gives you complete confidence in your measurement.
Printable Tool
Print this page at 100% scale (do not scale to fit) and use these reference circles to identify your ring size visually.
Place an existing ring that fits correctly over the circles below. The circle where the inside edge of your ring aligns most closely indicates your diameter and therefore your ring size.
Alternatively, cut out the measurement strip and wrap it around your finger in the same way as the paper strip method.
Scale Verification Bar (must equal 1cm when printed)
← 1cm →
Print at 100% scale to use as ring sizer
Common Questions