Toddler sizes are 2T, 3T and 4T covering ages 2 to 4, the "toddler years". This is the age that children are asserting their independence and dressing with attitude, and we have some great boys clothing styles including a range of denim jeans and shorts for toddler boys from Pop Jeans, and some terrific three piece sets from Babyworks and Nannette for Boyz. Don't forget to check out the classy plaid shirts for toddler boys from Gioberti - available in both Summer weight and in a warmer 100% cotton light flannel.