"I ordered this for my 3-year old who is very true to size. The web site indicated it was a size 2-4T. However, when I received the product the package said 2-4T for children ages 1-2. (Obviously this is incongruous). Sure enough, the jumpsuit barely fit her, and I couldn't even get the hat onto her head.
I had to scramble at the last minute to find another costume.
I assume the product labeled 2-4T would fit a 1-2 year old. There was also a smaller size option that would probably fit a 12 month old or younger."