We encourage students to purchase a Gi after a few classes and they know they want to take their training to the next level. When buying for children, it's best to size up and either roll up or hem the sleeves and pant legs so it grows with your child. Size Chart: Size 0000: Height 3'3"-3'5", Weight 30-40lb Size 000: Height 3'7"-4', Weight 35-45lb Size 00: Height 4'1"-4'2", Weight 45-60lb Size 0: Height 4'3"-4'5", Weight 60-70lb Size 1: Height 4'6"-4'9", Weight 70-90lb Size 2: Height 5'-5'3", Weight 90-110lb Size 3: Height 5'4"-5'6", Weight 110-140lb Size 4: Height 5'7"-5'9", Weight 140-170lb Size 5: Height 6'-6'2", Weight 170-200lb Size 6: Height 6'3"-6'5", Weight 200-230lb