So, you've found the perfect ring.
Whether it’s a surprise for your partner or an indulgent gift for yourself, we want to help you find the fit that’s just right for you.
We’ll go over everything you need to know about ring sizing so you can find the perfect one without even needing to leave your seat!
Let’s get started!
1. Measuring Tips and Prepping
i. Method 1: Measure an Existing Ring
ii. Method 2: Convert International Sizing on an Existing Ring
iii. Method 3: Use a String or a Piece of Floss
iv Method 4: Purchase Your Own Ring Sizer
2. Is My Ring Fitting Properly?
3. What if I Still Have the Wrong Size?
Measuring Tips and Prepping

There are various factors that can affect the size of your fingers. The below tips will help you measure your fingers accurately.
1. Measure at the end of the day
Your fingers are most likely to be at its largest at the end of the day.2. Don’t forget about your knuckle
Allow enough room for your knuckle. If your knuckle is a lot larger than the base of your finger, measure both areas and choose a size in between the two.
3. Measure the exact finger where you will wear the ring
The fingers on your dominant hand are usually slightly larger than your non-dominant hand. The same fingers on opposite hands may not always be the same size. It is important that you measure the exact finger which you will wear the ring.
4. Temperature and diet can affect your finger size
Cold weather can shrink your fingers, whereas heat and high-sodium foods can make your fingers swell.
5. Try multiple times
There are so many factors that can alter the sizing of your fingers. You can ensure accuracy with your measurement if you measure three or four times during the course of the day.
Method 1: Measure an Existing Ring
Measure the internal diameter of an existing ring that fits the desired finger.
Take your measurement and compare it with our guide below to find the correct size.
mm |
15.7 |
16.5 |
17.3 |
18.1 |
19 |
19.8 |
20.6 |
Size |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
Method 2: Convert International Sizing on an Existing Ring
Canada |
Japan |
UK |
4 |
7 |
H½ |
5 |
9 |
J½ |
6 |
12 |
L½ |
7 |
14 |
O |
8 |
16 |
Q |
9 |
18 |
S |
10 |
20 |
T½ |
Method 3: Use a String or a Piece of Floss
mm |
49.2 |
51.8 |
54.3 |
56.9 |
59.4 |
62 |
64.5 |
Size |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
Method 4: Purchase Your Own Ring Sizer
Is My Ring Fitting Properly?

The ring should fit snugly on your finger so that it doesn’t fall off. At the same time, it should be able to come off the knuckle area without much resistance.