My daughter wore this for her 2nd birthday party outdoors. The weather was warm - in the 70's - and she seemed very comfortable and happy all day. She fell asleep in it after the party, and even wanted to wear it again the next day!
I also have the larger size girl's costume for her to grow into, but I like this one better because the belt is a built-in feature on the dress, whereas the larger one has a separate belt that you tie in the back.
We didn't use the boots because she had some gold converse she wanted to wear, so I'm not sure of how those fit.