This size chart is for reference purposes only. Note that sizing will vary between brands.
Here are some tips to help you order the correct size. If you don't have a measuring tape, use a piece of string and hold it alongside a ruler.
Lift your arms slightly and measure around your body, crossing over the fullest part of your chest.
Place your hand on your hip with your arm bent at 90 degrees. Measure from the middle of the back of your neck, across the shoulder, and down your arm to the wrist.
With growing kids one size does not fit all