My toddler who is 2.5 years old wears 3/4T. 3T fits like a glove and I'm sure he will be done with all 3T within a couple more months but he can still swim in some 4T.. I ordered a 4T and it fits but I am guessing within 2-3 months it will be snug. Wish I went with 5T but I haven't bought one 5T yet.
Rating: [5 of 5 Stars!]