Size 4: chest 13'', length 16.5''

Size 5: chest 13.5, length 18''

Size 6: chest 13.5, length 19''

Size 7: chest 14'', length 19''

Size XS: chest 14'', length 20.5''

Size S: chest 14.5'', length 21''

Size M: chest 15'', length 22''

Measurements are average measurements for different sizes for Nike. Contact seller for any questions or specific measurements if needed.