They are super cute, and have stretch. I am 5’3 and I weigh about 130 lbs and I got a size 1. Originally I was going to get a size 5 or maybe even 3 but those were sold out. So I bought the 1 because they were final sale. Thankfully they fit well :) idk if this helps anyone but I can fit in size 1’s, 3’s, and 5’s at Hollister and that seems to be the case with my fn jeans as well