We have included our favorite tips & tricks to get those improvised engagement photos looking like a professional photographer was hiding in the bushes.
It's an age-old question: How do I find my girlfriend's ring size without ruining a surprise engagement? There are many tricks and tips out there, but many simply won't cut it when you need to be as exact as possible.
⚠️ Don't Try These: Avoid sticking rings in soap, trying on her rings to see where they 'fit you,' or tying a string around her finger. These methods are unreliable and could ruin your surprise!
As professional jewelers with over 40 years of experience, we recommend three proven methods that will give you the best results and ensure a perfect fit for your engagement ring.
This professional jeweler's method works if there is a ring that your girlfriend already wears on her ring finger (left hand). We can usually get within a half size if you measure a ring she wears on her right hand ring finger.
Another excellent option is to temporarily borrow a ring she already owns. This gives us the most accurate measurement possible.
As a last resort, close friends or family members may have valuable information from past jewelry purchases. They can help you narrow down the size range.
Pro Tip: Even if they have sizes for other fingers, write them all down! The more information we have, the better we can estimate her ring finger size.
Example of varying ring sizes on different fingers - everyone's hands are unique!
Many custom Celtic rings can only be sized up or down by one or two sizes. Being accurate from the start is crucial!
There's usually about a half-size difference between dominant and non-dominant hands. Each finger is a different size!
Wide bands fit more snugly than thin bands. Engagement rings with intricate designs may have sizing limitations.
If you want a custom ring or one that can't be easily sized, don't worry! We have solutions:
Check out our comprehensive ring sizing resources for international conversions and detailed measurements.
View Ring Sizing Chart → International Conversions →Browse our collection of handcrafted Celtic engagement rings, each designed to honor your heritage and celebrate your love story.
Shop Engagement Rings → View Wedding Sets →Download our professional ring sizing guide and send us your measurements. We'll help ensure a perfect fit!
Download PDF Guide →Our expert craftsmen are ready to help you find the perfect ring size and create the engagement ring of her dreams.
Walker Metalsmiths
1 South Main St, Andover, NY 14806
www.walkerscelticjewelry.com
Shopping for a Celtic Ring but unsure of your size? Use the chart below to convert between US/Canadian number sizes and the "Wheat Sheaf" letter system used in Ireland, UK, and Australia. Diameters and circumferences are given in both inches and millimetres. If you don't know your size at all, check out our guide on finding her ring size without ruining the surprise—the paper trick works for finding your own size too!
US Size 6–8 (UK L–Q)
Most jewelers sample in size 7
Shop Women's Rings →
US Size 9–11 (UK R–W)
Most jewelers sample in size 10
Shop Men's Rings →
Note: Ring sizing gauges and published charts do not always agree. The information below is the result of careful study and comparison of various sources, consistent with the instruments and measuring technique we use in our workshop.
| Diameter (inches) |
Diameter (mm) |
Circumference (inches) |
Circumference (mm) |
US/Canada | UK/Ireland Australia |
Japan | Swiss |
|---|---|---|---|---|---|---|---|
| 0.458 | 11.6 | 1.438 | 36.5 | 0 | — | — | — |
| 0.474 | 12.0 | 1.488 | 37.8 | ½ | A | — | — |
| 0.490 | 12.4 | 1.539 | 39.1 | 1 | B | 1 | — |
| 0.506 | 12.9 | 1.589 | 40.4 | 1½ | C | — | — |
| 0.522 | 13.3 | 1.639 | 41.6 | 2 | D | 2 | 1.50 |
| 0.538 | 13.7 | 1.689 | 42.9 | 2½ | E | 3 | 2.75 |
| 0.554 | 14.1 | 1.740 | 44.2 | 3 | F | 4 | 4.00 |
| 0.570 | 14.5 | 1.790 | 45.5 | 3½ | G | — | — |
| 0.586 | 14.9 | 1.840 | 46.7 | 4 | H | 7 | — |
| 0.602 | 15.3 | 1.890 | 48.0 | 4½ | I | 8 | — |
| 0.618 | 15.7 | 1.941 | 49.3 | 5 | J½ | 9 | — |
| 0.634 | 16.1 | 1.991 | 50.6 | 5½ | K½ | 10 | — |
| 0.650 | 16.5 | 2.041 | 51.8 | 6 | L½ | 11 | 12.75 |
| 0.666 | 16.9 | 2.091 | 53.1 | 6½ | M½ | 13 | 14.00 |
| 0.682 | 17.3 | 2.141 | 54.4 | 7 ★ | N½ | 14 | 15.25 |
| 0.698 | 17.7 | 2.192 | 55.7 | 7½ | O½ | 15 | 16.50 |
| 0.714 | 18.1 | 2.242 | 56.9 | 8 | P½ | 16 | 17.75 |
| 0.730 | 18.5 | 2.292 | 58.2 | 8½ | Q½ | 17 | — |
| 0.746 | 18.9 | 2.342 | 59.5 | 9 | R½ | 18 | — |
| 0.762 | 19.4 | 2.393 | 60.8 | 9½ | S½ | 19 | — |
| 0.778 | 19.8 | 2.443 | 62.1 | 10 ★ | T½ | 20 | — |
| 0.794 | 20.2 | 2.493 | 63.3 | 10½ | U½ | 22 | 22.75 |
| 0.810 | 20.6 | 2.543 | 64.6 | 11 | V½ | 23 | — |
| 0.826 | 21.0 | 2.594 | 65.9 | 11½ | W½ | 24 | — |
| 0.842 | 21.4 | 2.644 | 67.2 | 12 | X½ | 25 | 27.50 |
| 0.858 | 21.8 | 2.694 | 68.4 | 12½ | Z | 26 | 28.75 |
| 0.874 | 22.2 | 2.744 | 69.7 | 13 | — | 27 | — |
| 0.906 | 23.0 | 2.845 | 72.3 | 14 | Z3 | — | — |
| 0.938 | 23.8 | 2.945 | 74.8 | 15 | — | — | — |
| 0.970 | 24.6 | 3.046 | 77.4 | 16 | — | — | — |
★ = Most common sample size (Size 7 for women, Size 10 for men)
Rings and gauges are hard metal objects that can be measured exactly, but your finger is flesh and bone. Your finger is not perfectly round and cannot be measured with the same degree of accuracy as the ring. At the end of the day, the right ring is one that will stay on comfortably.
At Walker Metalsmiths, we use the True Diameter Method. The mark is read at the point where the wider side of the taper meets the edge of the ring. Wide rings are occasionally tapered and the smaller edge should be taken as the true size since this is the diameter of the largest finger that can fit into it.
Some jewelers use the Center Line Method, where the mark at the center of the ring is judged to be the size. Using this method, a wider ring will be measured at a size slightly smaller than its true diameter due to the taper of the sizing gauge. Because a ring size is a definition of diameter, we believe it is proper that a ring actually measures the true diameter rather than contain a fudge factor for width. Your local jeweler may disagree—calibration of gauges from different manufacturers may also vary.
All our rings are available in quarter sizes for the best fit. Custom sizing is always available.
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