This is my current favorite outfit for my baby. One piece outfits are so much easier and cuter than a onesie with pants. The sizing is exactly the same as a Carter's "Just One You" romper that I bought at Target. It is 100% cotton, so expect some shrinkage. The fabric is thicker and better quality than the romper I bought at Target. I just wish that this brand had more products like this, with more options available in terms of patterns and style.