I have the suit for my daughter (135 cm tall / slim built) in the Gr. 130/140 after recommendation from Amazon. It is too small, the manufacturer recommends the right size 140/150 for a height of 130 cm (have seen it only in the packaging of the suit). The belt is long enough for slim children, but for Stronger I recommend an "adult-belt" to buy. The stitching on the sleeves and pant leg -What the double size are ermöglichen- tight enough and can be cut away well. The suit is ideal for karate and with the double size solution nicely priced. Some people do not like the strength or rigidity of the material. The results with the use, I can almost twenty years of experience say the martial arts.
This here is regarding the manufacturer's recommended size of the suit.: Height suit size 100 cm 110/120 110 cm 120/130 120 cm 130/140 130 cm 140/150 140 cm 150/160 150 cm 160/170