Oura Ring 4 Sizing Kit

Oura Ring 4 Sizing Kit

A custom sizing kit that helps you find the perfect ring size before purchasing.

Size Before You Buy

Use the Oura Ring 4 Sizing Kit to determine your correct size, as Oura Ring sizes differ from standard ring sizes.

Available Sizes

Available in sizes 4–15, with no half sizes. Using the dedicated sizing kit is recommended.

Comfort and Accuracy

A properly fitted Oura Ring 4 helps ensure optimal data accuracy, comfort, and overall experience.

Choose a Finger

Can be worn on any finger and either hand. For optimal accuracy, the index, middle, or ring finger is recommended. Size the exact finger you plan to wear the ring on.

How It Should Fit

The ring should fit securely and comfortably at the base of your finger without rotating easily during daily activities. Wear the ring sizer for at least 24 hours to confirm the best fit.