Oura Ring Gen3 Sizing Kit - Size Before You Buy The Oura Ring - Unique Sizing - Receive Credit for Purchase

4.4 4.4 out of 5 stars | 643 ratings

Price: 10

Last update: 07-16-2024


About this item

OURA RING SIZING KIT - The Oura Ring Sizing Kit is the ideal way to find the perfect size. It’s a custom sizer that allows for you, and those around you, to find the ideal fit before purchasing.
RECEIVE $10 CREDIT - With a sizing kit purchase, receive a $10 Amazon credit towards the future purchase of an Oura Ring. Sizing kit is not returnable (terms and conditions apply).
NOT STANDARD SIZING - Oura Ring sizes are different from standard ring sizes, so it is important to size yourself using our sizing kit and to follow the instructions provided. Oura Ring is available in sizes 6-13. There are no half sizes.
HOW IT SHOULD FIT - We recommend wearing your ring sizer for at least 24 hours to confirm your best fit. Oura Ring should fit securely and comfortably at the base of your finger. Your ring should not rotate as you go about normal daily tasks.
COMFORT AND ACCURACY - A properly fitting Oura Ring will result in the highest data accuracy, comfort, and overall experience.
CHOOSE A FINGER - Oura Ring works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring on your index finger. Size the exact finger you plan to wear your Oura Ring on.

Product information


Top reviews from the United States

Ethan D.
5.0 out of 5 stars Don't skip getting the sizer before buying an Oura. Sizes are not standard ring sizes.
Reviewed in the United States on May 18, 2024
I am very glad I got the sizing kit. My standard ring size is a 10 and I initially assumed the Oura sizes were roughly the same. They are not! After using the sizing kit, I found that both the 12 and 13 were comfortable. Because the Oura's sensors need consistent contact with your skin, choose the smaller size if you are between sizes. (But a size that is choking your finger or needs to be twisted to remove is TOO small!)

I ordered my Oura in a size 12 and it fits perfectly -- feels the same as the sizing ring did.
Megan C.
5.0 out of 5 stars Definitely buy this before you purchase an actual ring
Reviewed in the United States on March 12, 2024
Don't make the same mistake I did, please do yourself a favor and buy this before you buy the actual ring. I thought I would be able to use the ring size I knew I was, but they do fit a little smaller than your typical US ring size. It's a pain to have to go through the whole return process, so definitely buy this to know first, it's worth the extra few days of time to try and the $10. Especially if you plan to wear the ring on a finger where the knuckle is larger than the base of your finger because if you're like me, you'll end up taking the ring on and off far more than you realize and having to have one that is snug enough to take accurate data but hard to get over the knuckle unless using soap and water- Although it's annoying to have to purchase a separate ring sizer, the $10 does get applied to the purchase of a ring, so it does balance itself out. Make sure to wear the sizer at least for a day, especially to sleep so you can feel it on your hand when you wake up, that was really helpful for me to sense what felt right during the normal swelling your hand goes through during the day.
Drew Estes
5.0 out of 5 stars This is a must have kit prior to your first purchase from this company. Trust me it is necessary.
Reviewed in the United States on May 1, 2024
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 I was skeptical about this kit and the necessity of it in the beginning. However I was immediately able to understand that it is not the same size for this ring as your normal ring size and it is seemingly impossible to be able to get the personal best fit without this kit for the first purchase of an aura ring if you want it to be compliant with the functionality and proper fit is the only option. Without this kit it will be a possibility of being completely incorrect and the order will be useless and it will be a headache to have to immediately return the ring and then wait for the support team to replace it for the correct size and then it's likely to be another incorrect size and so it is obvious that the kit is paramount. The kit is included in the purchase after you have received it and initiated the transaction process for the ring. I highly recommend this to anyone who is interested in purchasing an aura ring for the first time and has never had an opportunity to try one. The ease of use of the kit is perfect and easy to find the perfect size within a matter of minutes and then you will wear the sample for 24 hours and verify the fit with the suggestions to understand the protocols that they require for the fit and functionality to be perfectly suited for the user. The value of the kit is so much more than the period of time of the process of using it prior to the purchase. The quality of samples are very good and very comfortable and exactly the same as the actual ring in the dimensions. The appearance of the samples are very good and look acceptable for use at work or anywhere in the 24 hours of required use and will be fine.
Customer image
Drew Estes
5.0 out of 5 stars This is a must have kit prior to your first purchase from this company. Trust me it is necessary.
Reviewed in the United States on May 1, 2024
I was skeptical about this kit and the necessity of it in the beginning. However I was immediately able to understand that it is not the same size for this ring as your normal ring size and it is seemingly impossible to be able to get the personal best fit without this kit for the first purchase of an aura ring if you want it to be compliant with the functionality and proper fit is the only option. Without this kit it will be a possibility of being completely incorrect and the order will be useless and it will be a headache to have to immediately return the ring and then wait for the support team to replace it for the correct size and then it's likely to be another incorrect size and so it is obvious that the kit is paramount. The kit is included in the purchase after you have received it and initiated the transaction process for the ring. I highly recommend this to anyone who is interested in purchasing an aura ring for the first time and has never had an opportunity to try one. The ease of use of the kit is perfect and easy to find the perfect size within a matter of minutes and then you will wear the sample for 24 hours and verify the fit with the suggestions to understand the protocols that they require for the fit and functionality to be perfectly suited for the user. The value of the kit is so much more than the period of time of the process of using it prior to the purchase. The quality of samples are very good and very comfortable and exactly the same as the actual ring in the dimensions. The appearance of the samples are very good and look acceptable for use at work or anywhere in the 24 hours of required use and will be fine.
Images in this review
Customer image Customer image
M. Burke
4.0 out of 5 stars Appreciate the sizing kit is available; I agree larger sizes should be available
Reviewed in the United States on April 1, 2024
I'm planning to purchase this ring, so I ordered the kit to check sizing first. I've been looking at the Oura ring long before Amazon was set up as a store front for it. I was surprised to find that I'm in so large of a ring size. I'm 6' 1" and 230 lbs - not a fat guy by any means but not svelte either. My middle finger is a size 13, and that's the largest ring size they offer. The size 13 won't fit my index finger, but I planned to use it on my middle finger anyway. Size 12 fits my ring finger perfectly as well.

I'm glad I did order it. I've worn the "test ring" to see how it feels with it throughout a daily routine and sleeping. I've tried sleeping with my fitness tracker but I find I'm always aware of it and I don't sleep as well - which is why I wanted to know what I was getting into before laying out the money for the ring. While I do feel it on my finger, it starts to slip into the background pretty quickly, I can see that wearing this for a few days will make me forget about it altogether. Definitely get this test kit and try it out first.

I am surprised that size 13 is the largest size, but I don't know what's involved with the tech. I agree with others that have been frustrated with limited sizes, even if it works out OK in my case - I can understand their perspective. For those frustrated about no returns, it does clearly say there are no returns on this, so I considered it a $10 gamble. If you are really concerned about the layout of $10, order it directly from Oura - you need to pay for the ring itself and they will send you the free kit first. If none fit, they will refund you, essentially making the sizing kit free.
C. Gallagher
5.0 out of 5 stars Definitely order this first!
Reviewed in the United States on June 25, 2024
Amazon gives you the $10 back when you order your oura ring so this is worth the money. The sizers fit and look exactly like the actual ring so no surprises on size when your ring arrives. Easy to wear around for a couple days
Joe Dennis
1.0 out of 5 stars Largest size is too small - wasted my money
Reviewed in the United States on July 9, 2024
Evidently I wear a ring larger than the largest size in this ring sizing kit. This was a total waste of money to find out Oura doesn’t even make a size that fits me. Note the picture, largest size (13) won’t fit over my knuckle
Customer image
Joe Dennis
1.0 out of 5 stars Largest size is too small - wasted my money
Reviewed in the United States on July 9, 2024
Evidently I wear a ring larger than the largest size in this ring sizing kit. This was a total waste of money to find out Oura doesn’t even make a size that fits me. Note the picture, largest size (13) won’t fit over my knuckle
Images in this review
Customer image
Carole W. Arostegui
5.0 out of 5 stars Great Idea
Reviewed in the United States on June 29, 2024
Fabulous idea. T worked really well
Heather Harper
3.0 out of 5 stars Ran a little small
Reviewed in the United States on July 9, 2024
The Oura ring sizer, in my experience, ran a little small. I don’t know if my hands were cold, but what I felt was a snug, comfortable fit when sizing was a little tighter with the actual ring; so much so that I had to move it to a different finger than I had planned. Not a super big deal, but something to keep in mind.

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