How to choose the right size ring?

Choosing the right ring size is important to ensure that your ring fits comfortably and is comfortable to wear every day. The ring should be tight enough to stay in place, yet loose enough to be easily removed from the finger. Finger size can vary depending on time of day, temperature and other factors, so it's best to measure carefully.

Measuring finger size from the finger

There are various measuring tools for measuring the size of your ring and finger, but you can also measure them at home. Here are three ways to measure the size of your finger, with a special recommendation to use a ring gauge for best accuracy.

1. Using a ring gauge

When measuring the diameter of your finger, it is a good idea to measure it with a gauge that corresponds to the width of your ring. You can use a string or a paper-cut gauge or order a free gauge from our online shop. ring gauge. Remember, however, that the ring must go over the joint. One practical way to measure the thickness of a finger with a traditional gauge is to measure the finger at the thickest point. 

1. Slip one end of the ring gauge into the joint of the other end and pull.
2. Place the ring gauge on your finger and tighten it until it is tight but comfortable.
3. Adjust the ring gauge so that you can just barely get it over the joints off your finger. Remember that the ring should go over the joint.
4. Once you have the ring size to fit, read the ring size on the ring size scale. The sizing scale is in the US dimensions.
5. See the corresponding size chart on our website.

2. Measuring the thickest part of the finger (diameter)

If you already have a suitable ring, you can measure the inside diameter with a ruler or a more precise measuring instrument. Place the ring on a flat surface and measure the inside diameter in millimetres. Remember that wide rings may require a slightly larger size than thin rings. Rings that are curved on the inside often fit better, so a smaller size may be sufficient.

3. Use a string or paper to measure (circumference)

You can also measure the circumference of your finger using a piece of string or a strip of paper. Gently wrap the string or paper around the thickest part of your finger (usually at the joint) and mark the point where the string or paper meets itself. Use a ruler to measure the marked section in millimetres. This measurement corresponds to the circumference of your ring. Please note that this method may be slightly less accurate, so it is worth repeating the measurement a few times.

Tips for measuring

• Measure your finger several times at different times of the day. Fingers can swell during the day, so measuring both morning and evening will give a more accurate result.
• Avoid measuring with cold hands. The cold can shrink the fingers, leading to undersizing.
• Note the width of the ring. Wider rings may require a larger size for comfort.

Full table

*Ring circumference (⌀ mm) is ISO 8653:2016 measurement scale

Changing the ring size

We always recommend accurate measuring before ordering a ring to avoid unnecessary returns. However, if the ring is not the right size, you have a 14-day right of return under the Consumer Protection Act. You can change the size of the ring as follows:

1. Log in to your customer account. Visit account.ninja.fi and start the refund process.
2. Place a new order in the size of your choice in our online shop. This will ensure that you get the right size as quickly as possible.
3. Send back the original ring according to our instructions.

For more information on customer returns, please see here.

By choosing the measurement method that suits you best and following our tips, you can be sure that your new ring will fit perfectly. If required, our customer service team will be happy to help with any ring sizing queries you may have.