OURA RING GEN3 CHARGER - This is the only way to charge your Oura Ring Gen3. This USB-C cable charger is size specific, so be sure to get the size that fits your Oura Ring Gen3. You can find your Oura Ring Gen3 size on the inside of your smart ring. CHARGERS ARE SIZE-SPECIFIC - Your Oura Ring Gen3 size can be found on the inside of your smart ring.