When I think of pj's I personally think cozy, nice material, cute design etc. I ordered the medium. I'm a size 12 but I like my pajamas to be a little big...I could've fit two of me in the top. It was laughably big. And the material felt like something akin to gym gear. Not breathable, not cozy, not for me. The design was cute,the trouser length was good and the price was reasonable so for that reason I have given two stars.