Ordered my usual designer jean size 28, and these are quite loose. Could definitely have ordered a 27 and had them fit relaxed. On a side note, I ordered the Casey Tomboy, but the tag in the jean is "Sienna Slouchy Skinny." Maybe it is just the newer version of the Casey Tomboy. I got them at a good price, so I will keep. I suggest ordering down 1 size, unless you want them to look "too big" instead of just "relaxed." This is based on the Sienna Slouchy Skinny I received.I am 5'7", 120 lbs and usually wear a 4 (sometimes 2) or 29. I read the "fits large" comments and ordered a 27. They were still too big around the waist. I love the styling but couldn't make the large waist work so I returned them. In the meantime, the price on Amazon doubled so I was unable to buy a replacement in a smaller size.These jeans are so comfy and I was really impressed by the cut and fabric, especially for the price. I ordered one size down (usually a 27) and I can't imagine the waist fitting at all if I hadn't. Being one size smaller makes them fit like a skinny boyfriend jean. Would buy these again!Great relaxing fit. Its a bit loose but I was expecting that. It was worth my money. I got a curvy figure. I usually have to buy spandex, I wanted jeans.I like that these have a worn in look without the tears that most distressed jeans have right now. Fit is great.These are made of a beautiful, comfortable fabric that stretched. A lot. I have lost some weight, so I could have sized down -- and maybe should have. Still, they are fabulous quality. Wonderfully slouchy. You can forget you have them on. Well, almost.Very pleased! Tried these jeans on in a boutique before ordering. The fit was exactly the same and they were almost half the price!Poorly made. Inseam is way off on the right leg. First time wearing and missed the return window. Never again!