The measurements for our armbands are based on upper arm circumference, so customers are advised to measure around the part of the arm where the sensor is going to be positioned – you can use a tape measure or alternatively, a piece of string and ruler.
Small: 20 - 30cm
Medium: 25 - 45cm
Large: 40 - 55cm
Smaller sizes and child sizes are available on request and there’s no extra charge for these.