Serena Williams wears a size 10 dress, according to a 2010 report by the "Washington Post." She previously wore a size 12, but after losing some weight, she does not wear a size 12 dress any longer.
She says a new bob hairstyle and Pilates are the real reasons for her slimmer look. Her sister, Venus, has a lithe, long body that Serena claims makes it easier for her to fit into any dress. Because of her body's curves, she finds it hard to get into any dress. So, her objective is to be less bulky. She says she wants to gain the skills and knowledge for ensuring she ages nicely.