,Shop Oura Ring Gen3: Horizon Rose Gold,Amazon.com: Oura Ring Gen3 Horizon - Rose Gold - Size 9 - Smart Ring - Size First with Oura Ring Gen3 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness Tracker - 5-7 Days Battery Life : Electronics,Shop Oura Ring Gen3: Horizon Rose Gold,Oura Ring Gen3 Horizon - Rose Gold - Size 9 - Smart Ring - Size First with Oura Ring Gen3 Sizing Kit - Sleep Tracking Wearable - Heart Rate - Fitness