BT Kids Baby Girls 3pc Smiley Flower Pants Set 100% Cotton 0-3 Months: WEIGHT 9-12 LBS. HEIGHT 22-24 IN 3-6 Months: WEIGHT 12.5-16 LBS. HEIGHT 24-26.5 IN 6-9 Months: WEIGHT 16.5-18 LBS. HEIGHT 27-28.5 IN