Brand new in box. Get the perfect fit for your Oura Gen 2&3 Activity Tracker with the Oura Ring Sizing Kit Guide. This Brand New kit comes in sizes 6 - 13 and is perfect for enthusiasts looking to track their health. Made by Oura, a trusted Brand in Fitness Tech, this kit ensures that your Oura Activity Tracker fits comfortably and accurately. The kit is a must-have for anyone who wants to make the most out of their fitness tracking. Order now and start tracking your fitness goals with confidence.