Ring Size Guid

Choosing the right ring size is the most important condition for comfort and longevity. In this guide you will find two simple, accurate ways to measure your ring size, a conversion chart for common sizes, and a few professional tips.

Why does ring size matter?

A loose ring slips off or spins around, while a tight ring restricts circulation and is hard to remove. Worse, resizing is not always possible for some designs (such as full eternity bands or matching sets) and can damage the structure of the piece. It is best to get the size right from the start.

Method 1: Measure your finger

1. Take a soft tailor's measuring tape or a thin piece of string.

2. Wrap it around the finger you plan to wear the ring on. If you are creating a ring stack, think about where on the finger each ring will sit.

3. If you are using string, mark the point where the two ends meet with a pen.

4. Lay the string flat on a table and measure its length up to the mark in millimeters with a ruler. This number is your finger circumference.

5. Find that number in the chart below. If you fall between two sizes, choose the larger one.

Method 2: Measure an existing ring

This method is ideal when you are buying a gift for someone, or when you already own a ring that fits your finger perfectly.

1. Choose a ring that fits comfortably, without being loose.

2. Measure its inner diameter in millimeters, from the inner edge on one side to the inner edge on the opposite side, using a ruler or a caliper.

3. Match that number to the "Inner diameter" column in the chart and pick the closest size.

Ring size conversion chart

In Iran and most European countries, ring size is roughly the inner circumference of the ring in millimeters. For example, size 52 means a ring with a 52 mm inner circumference. The US size in each row is the nearest half size to the Iranian size.

Professional tips for accurate measuring

• Timing: late in the day, at normal room temperature, is best. Avoid measuring after exercise, a hot shower, or in very cold weather.

• Consider your knuckle: the ring has to slide over the knuckle and then settle in place.

• Band width matters: wide bands (over about 6 mm) fit more snugly and usually need a quarter to half size larger.

• Measure more than once: repeat at two or three different times and take the average.

• Avoid stretchy or very soft string, as it gives inaccurate numbers.

• Your dominant hand is usually slightly larger than the other.

If you are between two sizes, always choose the larger one. Making a ring smaller in the workshop is usually easier and safer than making it larger.

Frequently asked questions

How do I find the ring size for a gift?

Borrow one of their rings and measure its inner diameter, or trace the inside of the ring on paper and measure it later.

Can my ring size change over time?

Yes. Weight changes, pregnancy, age, and physical activity can all change your finger size. If it has been several years since your last measurement, measure again.

Do all fingers have the same size?

No. Your index, middle, and ring fingers each have a different size, and even the fingers of your two hands differ. Always measure the finger the ring will actually be worn on.

If you are unsure about choosing a size or designing a ring, get in touch with Aurel Studio and we will be happy to guide you.

You may also like our guides: to find your bracelet size, read this article, and to choose the right necklace length, read this article.