Size 1 (0-6 mo) up to approx 18 lbs
Size 2 (6-12 mo) up to approx 22 lbs
Size 3 (12-18 mo) up to approx 26 lbs
Size 4 (18-24 mo) up to approx 29 lbs
Size 5 (3 Toddler) up to approx 34 lbs
Size 6 (4 Toddler) up to approx 38 lbs