I was so excited to get these for my 5 year old. She loves to wear dresses all year round, but she needs to stay warm. I'm a size 2-4 because she wears 3T panties. However, when I received them I found that they were a bit small but the quality was excellent so I ordered a larger size rather than sending them back. To my disappointment, they don't go to bed. The crotch of the pantyhose constantly slides down to the middle of her thighs. Same thing happened with the smaller size so I went down to size 4-6. I think it's just bad design. There is no center seam. I have several similar leggings and they have the same slipping problem. Excellent stuff. Excellent quality. Bad design.