Easily find the right ring size at home: Measure the circumference of your finger with a narrow strip of paper or measure the inner diameter of a ring that already fits.
Easily find the right ring size at home
Wrap a narrow strip of paper or a piece of string snugly, but not too tightly, around your finger. Using a thin pen, mark a straight line across the strip, as shown in the photo. Then, lay the paper strip or string flat and measure the distance between the two marks with a ruler.
If you wrap the paper strip correctly around your finger and make the mark with as thin and straight a line as possible, you can measure very accurately. The result in millimeters corresponds directly to the ring size. For example, if you measure 55mm, that corresponds to ring size 55.
It is best to use the thinnest paper strip possible and a very fine-tipped pen. The straighter and thinner the mark, the easier and more accurately the result can then be measured with a ruler.
The photos show that a ring size of 62 was measured quite accurately.
What is my ring size?
You can easily estimate the size of a ring at home using a ruler. Before doing so, however, check to ensure the ring hasn't become oval over the years, as this will lead to an incorrect result. A ring will slightly adapt to a finger over time, and thin rings can sometimes become slightly oval as a result.
To find the ring size with a ruler, we only need to measure the inner diameter of the ring. It is best to place the ring on a ruler so that its inner edge just touches the first marking. Then, simply measure to the opposite side. The opposite side of the ring on the ruler will now be roughly at the 15–20mm mark. It is best to take a photo with your mobile phone of the ring on the ruler as shown here, and then read the number from the photo. This measurement method is not entirely precise, as the ruler only allows us to measure 15, 16, 17, 18, 19, or 20mm.
If you have a caliper to hand, you can measure the inner diameter of a ring particularly accurately. This allows you to read not only whole millimeters, but also, for example, 15.35mm.
As shown in the table, a difference of just about 0.3mm in the inner diameter corresponds to one ring size. Therefore, a measurement error of 1mm on a ruler can already lead to a deviation of about three ring sizes.
| Ring size | Inner diameter (approx.) |
|---|---|
| 45 | 14.3 mm |
| 46 | 14.6 mm |
| 47 | 15.0 mm |
| 48 | 15.3 mm |
| 49 | 15.6 mm |
| 50 | 15.9 mm |
| 51 | 16.2 mm |
| 52 | 16.6 mm |
| 53 | 16.9 mm |
| 54 | 17.2 mm |
| 55 | 17.5 mm |
| 56 | 17.8 mm |
| 57 | 18.1 mm |
| 58 | 18.5 mm |
| 59 | 18.8 mm |
| 60 | 19.1 mm |
| 61 | 19.4 mm |
| 62 | 19.7 mm |
| 63 | 20.1 mm |
| 64 | 20.4 mm |
| 65 | 20.7 mm |
| 66 | 21.0 mm |
| 67 | 21.3 mm |
| 68 | 21.7 mm |
| 69 | 22.0 mm |
| 70 | 22.3 mm |
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Is the right ring size really that important?
Not really; the difference of a single ring size is often not even noticeable in everyday wear. People often cannot decide on the "perfect ring size" and frequently oscillate between 2–3 different ring sizes, such as 55, 56, or 57, all of which fit on the same finger, sometimes even more.
In our photo, ring sizes 52, 55, and 57 all fit on the index finger. Size 57 already sits very loosely. However, since some people prefer to wear their ring a little looser, a larger size can also be preferred.
You can explain it like this: there is a ring size where the ring feels too tight, and one where it is too loose and no longer stays securely on the finger. The suitable ring sizes lie in between. Which exact size feels most comfortable depends on personal preference. Some prefer to wear their ring a little tighter, while others prefer a looser fit. Both can be appropriate. The important thing is that the ring sits comfortably and cannot slide off the finger.
Additionally, fingers can change slightly depending on the season. This can also change how a ring feels to wear. These differences are usually minor and can amount to about one ring size. Therefore, you generally do not need to take this into account.
A practical long-term solution can be a ring sizer set. With it, you can easily and reliably determine the right ring size for each of your fingers and try out different sizes over a longer period of time. This way, you can find out which size feels most comfortable in everyday life.
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