Refer to the chart below for your sizing, and remember to size up if you fall between sizes.
Matman Sizing:
4XS 40 to 55 lbs.
3XS 55 to 75 lbs.
2XS 75 to 95 lbs.
XS 95 to 115 lbs.
S 115 to 135 lbs.
M 135 to 160 lbs.
L 160 to 190 lbs.
XL 190 to 220 lbs.
XXL 220 to 250 lbs.
XXXL Over 250 lbs.