Youth Helmet Size Chart S 49-50 CM 19.3/19.7 Inch M 51-52 CM 20.1/20.5 Inch L 53-54 CM 20.9/21.3 Inch Helmet Size Tips (1)Wrap a measuring tape around your head Youth Glove Size Chart (Palm Width Size) XS 1.9 Inch S 2.3 Inch M 2.7 Inch L 3.1 Inch XL 3.5 Inch XXL 3.9 Inch Glove Size Tips (1) keep the palm face-up (2) measure the width of the palm (3) repeat 3 times and pick the largest one