18M: Height: 31-33″-Weight: 25.5-28 lbs. 12M: Height: 29.5-30.5″-Weight: 22.5-25 lbs. 5T: Height: 44″-Weight: 39-43 lbs. Boys Toddler Casual Elastic Waist Pull-On Shorts 3T: Height: 38″-Weight: 30-33 lbs.