2-3 yrs uses 3 balls yarn for short sleeved cardigan and 4 balls yarn for long sleeved.
4-5 yrs uses 3 balls yarn for short sleeved cardigan and 5 balls yarn for long sleeved.
6-7 yrs uses 4 balls yarn for short sleeved cardigan and 6 balls yarn for long sleeved.
8-9 yrs uses 5 balls yarn for short sleeved cardigan and 7 balls yarn for long sleeved.
10-11 yrs uses 6 balls yarn for short sleeved cardigan and 8 balls yarn for long sleeved.
12-13 yrs uses 6 balls yarn for short sleeved cardigan and 9 balls yarn for long sleeved.