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OURA

OURA Ring 5 Sizing Kit - Size Before You Buy

  • Based on 1,051 reviews
Condition: New
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  • – 4-month term
  • – No impact on credit to apply
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  • – Secure and straightforward checkout

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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Oct 26
Order within 7 hours and 23 minutes
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Style: Sizing Kit


Size: Sizing Kit


Color: Sizing Kit


Features

  • AVAILABLE SIZES - Oura Ring 5 is available in sizes 6-13. There are no half sizes
  • CHOOSE A FINGER - Oura Ring 5 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 5 on your index, middle, or ring finger. Size the exact finger you plan to wear your Oura Ring on
  • CHOOSE A FINGER - Oura Ring 5 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 5 on your index, middle, or ring finger. Size the exact finger you plan to wear your Oura Ring on
  • COMFORT AND ACCURACY - A properly fitting Oura Ring 5 will result in the highest data accuracy, comfort, and overall experience

Description

The Oura Ring 5 Sizing Kit allows for you and those around you to find the ideal fit before purchasing. With an Oura Ring 5 Sizing Kit purchase, an Amazon credit will automatically be applied to your Oura Ring 5 at checkout. A properly fitting Oura Ring 5 will result in the highest possible data accuracy, comfort, and overall experience. Oura Ring 5 sizes are slightly different from standard ring sizes and other Oura Ring generations. It’s important to size yourself and follow sizing instructions. Oura Ring 5 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing on your index, middle, or ring finger.

Special Feature: Ring Sizers for Oura Ring 5, Sizes 6-13


Battery Capacity: 22 milliamp_hours


Wireless Communication Standard: Bluetooth


GPS: No GPS


Shape: Round


Brand: OURA


Style: Sizing Kit


Color: Sizing Kit


Compatible Devices: Smartphone


Display Type: No Display


Additional Features: Ring Sizers for Oura Ring 5, Sizes 6-13


GPS Geotagging Functionality: No GPS


Band Material Type: Plastic


Water Resistance Level: Water Resistant


Human Interface Input: Unknown


Water Resistance Depth: 100 meters


Shape: Round


Style Name: Sizing Kit


Color: Sizing Kit


Battery Capacity: 22 milliamp_hours


Display Type: No Display


Brand: OURA


Model Number: JZ98-63255-AZ


Built-In Media: Oura Ring 5 Sizing Kit


Warranty Description: Limited Manufacturer


Wearable Computer Type: Smart Ring


Manufacturer: Oura


Wireless Compability: Bluetooth


Compatible Devices: Smartphone


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

This item is non-returnable:

Final sale - No returns

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Keep it in my work bag for my co workers to use
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
Great helped me pick my size for my new oura ring and worked great. The credit was easy to apply to the new oura ring as well
Reviewed in the United States on September 30, 2026 by Laura
    • Must buy before purchasing Oura ring
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
Arrived quickly and worked great! I put on two of these to wear during the day and overnight. One on my right ring finger and one on my left pointer. Woke up in the middle of the night and swapped for larger sizes. They weren’t kidding about wearing for 24 hours to determine size because of hand swelling, etc. Ended up buying the larger size (nine) and ordered my Oura! Everything went as promised. Fit was perfect and accurate and the ring can be swapped easily and comfortably between four of my fingers depending on my temperature and the time of day. Have been wearing the Oura on my non dominant left hand middle finger during the day and pointer at night for great results. The coupon was automatically applied in the cart as promised. Highly recommend using the sizing kit! ... show more
Reviewed in the United States on October 3, 2026 by Ashley
    • Definitely Worth Getting Before Ordering an Oura Ring
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
My husband and I are both planning to order the Oura Ring 5, so this sizing kit ended up being much more useful than I expected. I originally thought I’d be able to order based on my regular ring size, but I’m really glad I didn’t. For reference, my engagement ring is a size 6.5 and my wedding band is a 7, but after wearing the sizing rings for a while, I actually decided an 8 was the best fit for my Oura Ring. One thing I really liked is that the kit encourages you to wear the sample rings for a full day and overnight instead of just trying them on for a few minutes. I noticed my fingers changed size throughout the day depending on the temperature and activity level, so testing them over a longer period gave me a lot more confidence in my choice. My husband also ended up choosing a different size than he originally expected, so it was helpful for both of us. Another bonus is that the cost of the sizing kit includes a $10 credit toward the purchase of the actual Oura Ring, which makes it an easy decision. Considering the price of the ring itself, I’d much rather spend a little time making sure I get the correct size than deal with exchanging it later. If you’re thinking about ordering an Oura Ring, I definitely recommend starting with this kit instead of guessing based on your regular ring size. ... show more
Reviewed in the United States on July 9, 2026 by Kayla DeMarco
    • Good
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
It’s ok, but unfortunately the sizing stops at 13. No bigger sizes beyond that. Looks good on the finger
Reviewed in the United States on August 2, 2026 by Ken
    • So glad I used the kit first!!
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
I’m really glad I purchased the Oura Ring sizing kit before ordering my actual ring. I assumed I would wear my typical ring size, but I actually ended up needing to go up one full size. I tried my usual size for an entire day, as recommended, and I’m so glad I did. It seemed fine initially, but after wearing it for several hours, it was definitely too tight. I would have been really disappointed if I had ordered the actual ring in that size. The kit made it easy to try different sizes and actually live with one for a while before committing. It’s also great that the cost of the sizing kit is credited toward the purchase of the ring, so there really isn’t a downside. Definitely recommend doing this first rather than guessing your size! ... show more
Reviewed in the United States on August 29, 2026 by Mish
    • A Must-Have Before Ordering an Oura Ring 5
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
If you are considering purchasing an Oura Ring 5, I highly recommend getting the sizing kit first. My wife wanted an Oura Ring for her birthday, and after reading reviews, we decided it was important to make sure we selected the correct size before placing the ring order. The sizing kit arrived the same day we ordered it, which made the process very convenient. After trying the different sizes, my wife was able to determine the perfect fit for her finger with confidence. Another nice benefit was the $10 credit toward the Oura Ring purchase. Once her ring arrived, the sizing was accurate and the ring fit exactly as expected. If you are planning to purchase an Oura Ring through Amazon, I strongly recommend ordering the sizing kit first. It takes the guesswork out of choosing the correct size and can help save you the hassle of dealing with an incorrectly sized ring. ... show more
Reviewed in the United States on August 18, 2026 by Lee Michaels
    • Good kit but
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
If you are purchasing your actual ring through an HSA/FSA you don’t get the $10.00 off your purchase.
Reviewed in the United States on October 14, 2026 by Alyssa
    • Helped us find the right size
Style: Sizing Kit Size: Sizing Kit Color: Sizing Kit
This sizing kit works great; we ordered it for my elderly mother-in-law and had her wear the size that fit her for a week before ordering the actual ring. She had no issues with it, and we felt confident that when we spent the money on the actual ring that we were choosing the correct size. Bonus is that for the cost of this pack, when we ordered the actual ring, we were given a $10 credit towards that ring so we didn't lose any money in this purchase. I would recommend getting this pack before buying the Oura ring. ... show more
Reviewed in the United States on August 2, 2026 by Stephanie

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