My daughter is 18 months old, and she has outgrown all of her onsies, so I was looking for longer t-shirts for her. She is off the top of the charts for height, so very tall, but average weight. I just started buying her 2T clothing, but based off of other reviews, I got her 3T's in these t-shirts. I am glad I did. They just barely fit. They are not tight on her, but they are not loose either. They hit her at about the hips, length-wise. They fit her perfectly at the shoulders. I was afraid that they'd shrink in the wash, but I washed one and compared it to an unwashed one and they were the exact same size. They are adorable and look really comfy and cute, but I am afraid that she'll outgrow then within a few months since there is no room to spare right now.