If Goldilocks went searching for the perfect bottom—not too big, not too small; not too perky, not too flat; not too toned and not too cushy, but just right—she would find it in California attached to the backside of one Natasha Wagner, who has, according to America's denim industry, the best bottom in the country.

Standing at five feet eight inches, Wagner is a leggy size 6. She wears a 28 jean in premium denim, and for the past fourteen years her derriere has been a “secret weapon” used by brands like 7 For All Mankind, Citizens of Humanity, Re/Done, Paige, Vince, Proenza Schouler, Gap, Lucky Brand, Old Navy, and Levi's (to name just a few), ensuring that their jeans come out with the “perfect” fit. “Natasha’s curves are in all the right places,” explained Jennifer De Clark, senior director of women’s design and merchandising at 7 For All Mankind. “And having the perfect proportions is key to a great jean that will fit many different body types. She is the perfect size 28!”

Passed from one brand to another through word of mouth (“Naturally when you're that good, it doesn't stay a secret for too long,” said Black Orchid designer, Julien Jarmoune, another client of Wagner’s), the 34-year-old Valencia, California, native and her “balanced” hip-to-waist ratio has become responsible for making your favorite jeans look as good on you as they do on your best friend, your mom, and your sister: In other words, a “wide range” of body types.

“Natasha has the perfect marriage of body types,” clarified Jarmoune. “Because if you fit with someone who is too curvy (tiny waist, big butt), or with someone who has a straight body (no hips), you are limiting yourself to just a certain body type. A jean that is fit on a straight body will never look good on someone who has curves. That's why Natasha comes into play perfectly. She has the best of both worlds where she's slim and she still has shape. Additionally, she has great legs that are the perfect length (she fits our standard 30-inch leg inseam flawlessly) so that our jeans will work for someone who is short or tall.”