Oura Ring 4 Sizing Kit – Size Before You Buy The Oura Ring 4 – Unique Sizing, Not Standard US Ring Sizes – Receive Credit for Purchase
$10.00
Price: $7.99 - $10.00
(as of Nov 20, 2025 13:09:54 UTC – Details)
The Oura Ring 4 Sizing Kit allows for you and those around you to find the ideal fit before purchasing. With a sizing kit purchase, a 10 credit will automatically be applied to your Oura Ring 4 at checkout. A properly fitting Oura Ring 4 will result in the highest possible data accuracy, comfort, and overall experience. Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our tools and to follow our sizing instructions. Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger.
OURA RING 4 SIZING KIT – The Oura Ring 4 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 perfect fit before purchasing
SIZE BEFORE YOU BUY – Oura Ring 4 sizes are different from standard ring sizes. Size yourself with the Oura Ring 4 Sizing Kit. For additional details, see “From the brand” section below
NOT STANDARD SIZING – Oura Ring 4 sizes are slightly different from standard ring sizes, so it is important to size yourself using our Oura Ring 4 Sizing Kit. Oura Ring 4 is available in sizes 4-15. There are no half sizes
COMFORT AND ACCURACY – A properly fitting Oura Ring will result in the highest data accuracy, comfort, and overall experience
CHOOSE A FINGER – Oura Ring 4 works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Oura Ring 4 on your index, middle, or ring finger. Size the exact finger you plan to wear your Oura Ring 4 on
HOW IT SHOULD FIT – Oura Ring 4 should fit securely and comfortably at the base of your finger. Your ring should not rotate as you go about normal daily tasks. We recommend wearing your ring sizer for at least 24 hours to confirm your best fit
Customers say
Customers find the Oura Ring’s sleep and activity tracking features impressive, with accurate monitoring of heart rate and sleep patterns, and consider it better than an Apple Watch. The battery life and functionality receive mixed reviews – while some report it lasts days and works well, others say it doesn’t last and stops working after a week. The sizing kit helps avoid guessing the wrong size, though customers note the sizes are not traditional ring sizes. Moreover, the ring’s scratch resistance is concerning, with customers reporting it scratches too easily. Value for money opinions are divided, with some finding it worth the money while others say it’s not worth the price.
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