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Learn About Oura Ring

Oura Ring 4 is here

Sleeker. Smarter. Made for you.

Powered by new Smart Sensing technology which adapts to your finger for the most accurate, personal data yet. The updated, all-titanium design makes it more comfortable than ever. All with a battery that lasts up to 8 days. 

Find your Oura Ring 4 size

Oura Ring 4 sizes are different from Oura Ring Gen3 sizes. They are also different from U.S. standard sizes. There are 2 options for finding your size before you buy:

Option 1: Order an Oura Ring 4 sizing kit online

Add the sizing kit below to your cart, and a free $10 Best Buy e-Gift Card will be added automatically.*

  • Choose from 12 sample rings in the sizing kit
  • Wear the ring sample for at least 24 hours to determine your size
  • Then, return to this page and use your Best Buy e-Gift Card toward your Oura Ring 4 or other items
Watch the video

Option 2: Get sized in store for your Oura Ring 4

The Oura Ring 4 sizing tool is available at most Best Buy locations. Find a store near you to find your size today.

Watch the video
best buy store

Compare Oura Ring models

Model
Oura Ring 4
Oura Ring Gen3
Design and material Fully titanium exterior and interior. Recessed interior sensors at 0.3mm. Titanium exterior, epoxy interior. Raised interior sensors at 1.3mm.
Sensing platform Smart Sensing dynamically selects optimal signal path for accuracy Fixed, static configuration of optical paths
Battery Up to 8 days Up to 7 days
Sizing Sizes 4–15 Sizes 6–13
Membership price $5.99/month $5.99/month

Take control of your health with Oura Ring Gen3

Find your size before you buy with the Oura Ring Gen3 sizing kit (available online only). Oura Ring Gen3 comes in two distinct styles.

Oura Ring gives
the gift of health

Help a friend or loved one track their wellness by giving them an Oura Ring 4 sizing kit (sizing kit includes a free $10 Best Buy e-Gift Card*). Then, purchase an additional Best Buy Gift Card they can use toward an Oura Ring 4.

More power to you with Oura Ring membership

Sleep, readiness, and activity scores are just the beginning. Members also get personal guidance, deep data, and accurate insights delivered daily. Plus, your first month is free.* After that, continue getting the most out of your Oura Ring for $5.99 per month.

With membership, enjoy:

  • In-depth sleep analysis, every morning
  • Cutting-edge stress, heart health and women’s health insights
  • Live, accurate heart rate monitoring
  • Body temperature readings for early illness detection

Disclosures

Free e-gift card with Oura Ring sizing kit:

*Once you’ve used the sizing kit to determine your perfect fit, return to BestBuy.com to order your new Oura Ring in the correct size. You can use your free e-gift card toward your Oura Ring purchase or other items at BestBuy.com. 

See offer details

Free 1-month Oura Membership:

*Free one-month trial membership for new Oura account holders only. Trial membership begins when you create an Oura account and pair your Oura Ring with the Oura app. You will be prompted to enter your payment information during your trial membership in order for your membership to continue after the trial period. After 30-day promotional period, membership is $5.99 + tax per month and will auto-renew until cancelled. Cancel any time by signing into your Oura account.