Ensure the perfect fit for your Oura Ring 4 with this official Oura Ring Sizing Kit. This kit helps determine the most comfortable and accurate ring size before ordering your smart ring.

• Includes sizes 6 to 13 – 8 total plastic sizing rings

• Comfortable trial fit – test wear each size for optimal 24-hour fit

• Helps order accurate size – reduces risk of exchange or return

• Reusable and sharable – perfect to pass along to a friend

Ideal for customers planning to purchase an Oura Ring Gen 3 or Gen 4. Note: No electronics or smart ring is included.