The purpose of this study was to investigate the effect of the depth of fashion product line on sales. The depth of the fashion product line was defined as the variety of style, color, and size in the outwear line for this study. Data were collected from the 98 brands in 4 department stores located in Seoul and Pusan. The result showed the significant impact of the variety of the outwear style on sales. Even after controlling the effect of advertising and the level of price in each brand, significant effect of the variety of outwear style were noticed on sales.