Rings – fitting sizes

Many rings are fixed and rigid and each ring only has one size. If a particular ring in a particular size does not fit one particular finger you may still be able to wear the ring on another finger. The important issue is that you must be able to slip the ring on your finger and it must be tight to stay on, so it is best to get the correct size.

There are many ways to specify the size of a ring; we prefer to use internal circumference (IC) and internal diameter (ID) because these are measurements everyone can make, communicate and understand.

Internal circumference is easy to measure on your finger, you can use a strip of paper, a piece of ribbon or string, and then a ruler; internal diameter is easy to measure on the ring, you can use a ruler or a caliper gauge.

The two measure are related (IC = π x D) as shown on the chart below. The most popular women’s sizes are 52,54,56 (IC mm) and for men 56,58,60.

48 mm15.27 mm
50 mm 15.91 mm
52 mm 16.55 mm
54 mm 17.18 mm
56 mm 17.82 mm
58 mm 18.45 mm
60 mm 19.09 mm
62 mm 19.73 mm

Some rings are adjustable and can fit a range of people and fingers. Even though the ring is adjustable a size may be specified. This is usually the ‘resting size’ and it will comfortably expand to a couple of sizes above. If two sizes are specified they indicate the range it will fit

If the ring is threaded on an elastic material then it will stretch to accommodate a range of sizes and once again if a size is specified it will usually be the ‘resting size’.

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