Have always had a problem getting the correct fit with jeans, either too small in the waist, or fit at the waist but bagging in the rear.  However Levi has come up with the curve fit and it is great.  I started out with the demi curve thinking I had the right one, but these are a little looser in the hips than I like.  I'm keeping them because they are so comfortable, good relaxing jeans.  I ordered the "slight" curve the next time and they are perfect.  I'm going to order a couple more pairs before they change the design.  I had to order one size larger than my Calvins, but don't worry about the number, these fit great.  Quality is excellent, color is what it says it will be.  Try them!