This pattern is knitted on 4mm and 4.5mm needles and will fit age 2 years to 11 years, chest 22" - 32". You will need the following balls of Peter Pan Cupcake:
Chest 22": 3 balls
Chest 24": 4 balls
Chest 26": 5 balls
Chest 28": 6 balls
Chest 30": 7 balls
The short-sleeved design will take one ball less for each size.