My daughter wears 3 but I bought these shirts in 4 to wear longer. They are very sweet! I love the design and the quality of the fabric. They feel tight rather than loose or edgy, which suits her. They are also longer than a regular t-shirt. I don't like that the neckline is so wide and I don't think it's the size. They're just cut off like that, hence the four and not five stars. It makes them look a little disheveled, but I bought them mainly to play with, so I don't mind. Very important! I recommend.