This is a very nice jacket for my 2 year old son. He is usually in 3T but I followed other people's advice and ordered up a size and the 4T fits great. The reason we bought this jacket was because it's recommended you don't put your child in a car seat with a fluffy winter coat, just a nice warm fleece one, so this coat gets a lot of wear! My son loves it, asks to wear his "blue coat" over all of his other coats. I will continue to get Columbia coats for my kids every year. Highly recommend!