My child wore this a few times during basketball practice two years ago, but has since quit, so I am selling it. Size: S/M Upper arm circumference: 12cm, Lower arm circumference: 8cm Length: 42cm *Please note that there may be slight variations due to amateur measurements. I work during the day, so I may be slow to respond to questions. Shipping will be in simple packaging. Please refrain from purchasing if you are sensitive to used items. I strive to make transactions pleasant for both parties. I am not used to this, so please forgive any shortcomings in my handling.