The Mulu blog
How to Measure Your Ring Size at Home
Three easy ways to find a ring size, and the mistakes that lead to the wrong one.

Canada uses the same ring size scale as the United States, running from about size 3 to 13 for most adults. You can get close at home, and a jeweler can confirm the final size.
Three ways to measure
- Use a ring that already fits. Measure the inside diameter in millimetres, or place it on our ring sizer.
- Use paper or string. Wrap it around the base of the finger, mark where it meets, and measure the length in millimetres.
- Visit a boutique. A professional sizing takes a minute. Find your nearest boutique.
Get an accurate reading
- Measure at the end of the day, when fingers are at their largest.
- Avoid measuring when your hands are very cold.
- Check that the ring will pass over your knuckle.
- Choose a slightly larger size for a wide band, because wide bands fit more snugly.
- Measure the correct hand. Your dominant hand is often slightly larger.
If it is a surprise
Borrow a ring they wear on the same finger, or ask a friend or family member to find out. Most rings can be resized later, but some designs cannot, so check with your jeweler before you buy.