When it comes to shopping, the average American man has it made. At 189.8 pounds and a size 44 regular jacket, he can wear Abercrombie & Fitch, American Apparel or Armani. Department stores, mall retailers and designer boutiques all cater to his physique — even when it’s saddled with love handles, a sagging chest or a moderate paunch. In menswear, shlubby is accommodated. But the average U.S. woman, who’s 162.9 pounds and wears a size 14, is treated like an anomaly by apparel brands and retailers — who seem to assume that no one over size 10 follows fashion’s capricious trends.