I've recently been getting thinner and I have noticed my jeans (I was a 5S), have been feeling very loose on me. While in Tillys I thought maybe I should try the next size down, just to see if I truly did go down a size. I grabbed a random pair in the next size down and tried them. They fit good and the quality was acceptable but i lightly tugged on the belt loop to pull them up a bit, and it completely tore off. As this is not a huge deal, l I'm not upset or disappointed with Tillys. I just wouldn't recommend their jeans. Try F21 if you're looking for affordable and durable jeans. Hollister is also and option but its a little more pricey.