Debby Skaler-Labendz, 39
Before: "If my jeans fit right, I feel sexier, happier, livelier," Debby says. But here she is hiding a terrific body under a pair that's at least a size too large. You want comfortable, not baggy (most denim "gives" over time, so it's okay if jeans feel slightly tight at first).
After: Slim enough to tuck into boots, the hip new skinnies—narrow, tapered jeans that can be "scrunched" at the bottom—aren't for everyone (you definitely need good legs), but on Debby, they're smashing.