Plus-size clothing is by no means new. The Lane Bryant brand, for instance, was founded in 1900 in New York as the first women’s apparel retailer in America devoted exclusively to plus sizes. In the same vein, retail chain Ashley Stewart was founded in 1991 to serve plus-sized urban career women in inner-city New York neighborhoods. But what was a niche business for decades has become part of the fashion mainstream. According to Mariah Chase, CEO of women’s plus-size brand Eloquii, 67% of American women wear sizes 14 and above–typically referred to as “plus size.” But only 20% of women’s apparel spending is in that category. She says women in that size category represent a $21 billion market that is under-served.

This chart shows the largest U.S. online apparel retailers that primarily sell plus-size fashion, ranked by global e-commerce sales. To view this data, you must be a Digital Commerce 360 Premium Member. If you’re a member, sign in. Or click here to learn more about Premium Membership benefits.