Vulkan ULTRA Light Kids Gi - Black-M3 Vulkan Size Chart Height Weight (lbs.) Size Weight of Gi 2'2"-2'8" 25 - 45 M-0 1.6 lbs. 2'8"-3'4" 45 - 65 M-1 1.8 lbs. 3'4"-4'0" 65 - 85 M-2 2.2 lbs. 4'0"-4'11" 80 - 100 M-3 2.4 lbs. NOTE: This size chart is made to help find the right size of gi for each child. However, the variables of each child's size and proportions, such as weight, height, build, arm length, leg length and other measurements will influence the gi size