IBJJF kids system (ages 4–15)

IBJJF kids belts for ages 4 to 15: after white come four colour groups, grey, yellow, orange and green, each with three belts (with a white bar, solid, with a black bar). Each group has a minimum age; kids belts have no minimum periods. In the year the child turns 16 they move to the adult belts: grey, yellow and orange lead to blue, green to blue or purple at the professor's discretion.