How to know my Circular Ring size?
Please read our sizing page
The Circular ring sizes fit the standard ring sizes. If you already know your ring size, Circular sizes will be the same. You can also go to any jeweler to ask for your US equivalent finger size.
If the size does not fit when you receive your ring, you'll have 14 days upon delivery to change it for free (except shipping) if your ring is unworn and intact.
For Generation 2
The ring comes in 9 different sizes from US 6 to US 14. We don't do half sizes.
You can use this tool to determine the right size.
For Generation 1
The ring comes in 8 different sizes from US 6 to US 13. One of them should fit. We don't do half sizes.
You have the option to receive a sizing kit before delivery to confirm your size. It costs $5. You can get one here.
Here is the free Circular sizing guide to be printed
Here is the free Circular rings to be 3D printed
The sizing rings are made of plastic and may be sharper on the edge and on the charging pins compared to the real ring.
Here are some wearing recommendations: You can wear Circular on any finger. It has to fit comfortably. If you're between sizes, we usually recommend choosing the bigger size that fits. If you have big knuckles, choose the smallest size that slides over your knuckle. It’s better tight than loose.
It is best to wear Circular on the fingers of your non-dominant hand. Eg: If you are right-handed, wear it on your left hand. Note that the three middle fingers give the most accurate readings.
Finger size can vary depending on the time of the day, especially in the morning/evening when your fingers are slightly larger.
The Circular ring sizes fit the standard ring sizes. If you already know your ring size, Circular sizes will be the same. You can also go to any jeweler to ask for your US equivalent finger size.
If the size does not fit when you receive your ring, you'll have 14 days upon delivery to change it for free (except shipping) if your ring is unworn and intact.
For Generation 2
The ring comes in 9 different sizes from US 6 to US 14. We don't do half sizes.
You can use this tool to determine the right size.
For Generation 1
The ring comes in 8 different sizes from US 6 to US 13. One of them should fit. We don't do half sizes.
You have the option to receive a sizing kit before delivery to confirm your size. It costs $5. You can get one here.
Here is the free Circular sizing guide to be printed
Here is the free Circular rings to be 3D printed
The sizing rings are made of plastic and may be sharper on the edge and on the charging pins compared to the real ring.
Here are some wearing recommendations: You can wear Circular on any finger. It has to fit comfortably. If you're between sizes, we usually recommend choosing the bigger size that fits. If you have big knuckles, choose the smallest size that slides over your knuckle. It’s better tight than loose.
It is best to wear Circular on the fingers of your non-dominant hand. Eg: If you are right-handed, wear it on your left hand. Note that the three middle fingers give the most accurate readings.
Finger size can vary depending on the time of the day, especially in the morning/evening when your fingers are slightly larger.
Updated on: 11/03/2025
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