Size 17 meaning finger circumference is 56mm/2.2inches

This Fitness Smart Ring Activity/Sleep/Heart Rate Tracker is a must-have for fitness enthusiasts. It provides detailed measurements of your heart rate, sleep patterns, and activities like running and jogging. The ring is designed to fit comfortably on your finger, with a size of 17.

The tracker comes with a range of features, including a sleep tracker to monitor your sleep quality, and it is perfect for those who want to keep track of their fitness goals. Its compact design makes it easy to carry around, and it weighs only 0.07 kg. This Fitness Smart Ring is a great addition to your fitness gear collection.