I'll bet those jeans won't look good on ME either! And I "fit" in between 0-16!
My body shape is weird. I'm shaped like a chicken. My legs and thighs are thin and bony, but my belly is round and fat. If jeans fit my tummy, then they are baggy on my butt and my legs. If they fit my legs, then the waist won't zip and button.
Fitting in isn't always about sheer size!!! I don't "fit" in either!!!
As I've gotten older, I've lost my butt. I look in the mirror and wonder where it went. Pretty soon, my butt will look like two dried apricots. And my belly will be round still.

Michelle is right. We shouldn't let a clothing line determine how we feel about ourselves. Clothes are manufactured to fit the average person. I realize that this is where tailors and seamstresses come in handy. My sister always has to have her clothes altered because she is so short. I'll have to start having my pants altered so I don't look weird wearing clothes off the rack.
Cabi obviously fits women between 0-16. Not for you, no big deal. There are lots of other options. Go to the gym to get healthy and feel good, not to "fit in." Why should you feel bad about being larger than size 16? Size has nothing to do with beauty.
I know. I'm smaller than size 16 and I'm not beautiful at all. :P
There are so many large women who are absolutely gorgeous. Their round curves are so much prettier than bony butts and wrinkly skin.