Jeans are so frusterating to buy! As I've lost weight, I've unfortunately maintained my apple porportions.
I think my waist is like a size 18 and my hips are a size 12 according to oldnavy.com's size chart. I generally buy low-rise, stretch jeans. I hate the saggy butt, so I try on jeans for hours to find ones that go above the roll of my stomach, yet fit the booty.
I've had really good luck at Ross since they often have several brands. It's a good place to go if you're losing weight too, since you can pick up some jeans for like $14. I've gone from a 20 to a 12 and had luck finding a couple good fitting jeans in each size at Ross.
Also, when buying the stretch jeans, it's good to buy them really tight. After wearing them for an hour, they loosen up considerably.