Fitbit inspire is a friendly fitness tracker for every day that helps you
build healthy habits. This encouraging companion motivates you to reach your
weight and fitness goals and even enjoy the journey with calorie burn
tracking, goal celebrations, sleep tracking and guidance, reminders to move
and up to 5 days of battery life. Large fits wrist 7.1"" 8.7"" in
circumference. Small fits wrist 5.5"" 7.1"".