The Ultimate Guide to Ring Sizing | Roberts & Co Jewellers

If you find a chart or a tool that converts one size system exactly into another then it is incorrect in one or both of the sizes. And most of them do. If you need to convert between sizes the best and most accurate way is first convert the ring size to millimetres. Once you have the circumference or diameter in millimetres use the millimetre size to find the nearest size in the other system. And the key word is nearest, as they do not equate exactly.

Ring sizing can be a bit tricky, especially if you're not familiar with the various international ring size systems. However, with a few tips and tricks, you can easily determine your ring size at home or in a jewelry store.

  1. Measure your finger in millimetres

An inexpensive way to determine your ring size is by measuring the circumference of your finger in millimetres. To do this, wrap a piece of string or paper around the base of your finger and mark where the string or paper overlaps. Then, measure the length of the string or paper in millimetres using a ruler. This measurement will give you your finger's circumference, which you can use to determine your ring size.

  1. Use a ring sizing tool

If you prefer not to use a piece of string or paper, you can also use a ring sizing tool, which can be found at most jewelry stores or online. These tools typically consist of a set of metal rings in various sizes, which you can place on your finger to determine the best fit.

  1. Visit a jewelry store

If you're unsure about your ring size, you can always visit a jewelry store and have a professional jeweler measure your finger for you. This is especially helpful if you're purchasing a ring with a wider band, as you may need a slightly larger size to accommodate the additional width.

  1. Consider the fit

When determining your ring size, it's important to consider the fit you prefer. Some people prefer a looser fit, while others prefer a tighter fit. Keep in mind that your fingers may also swell in the heat or after eating salty foods, so you may want to err on the side of a slightly looser fit.

  1. Be aware of international ring size systems

Different countries use different ring size systems, which can be confusing if you're purchasing a ring from a foreign website or traveling abroad. Some of the most common ring size systems include:

  • US ring size system: This system uses whole and half sizes, with the smallest size being 1 and the largest size being 13.5.
  • UK ring size system: This system uses letters, with the smallest size being A and the largest size being Z+6.
  • European ring size system: This system uses numbers, with the smallest size being 41 and the largest size being 75.
  • Japanese ring size system: This system uses numbers, with the smallest size being 1 and the largest size being 36.

To convert your ring size between different systems, it's best to consult with a professional jeweler as many online ring size converter are inaccurate.

In conclusion, determining your ring size doesn't have to be a daunting task. With a few simple measurements and considerations, you can easily determine your ring size and ensure a comfortable and secure fit.