Men who fit into the size range offered by most brands have Mr. Porter, Valetmag.com and GQ to look to for style inspiration. But where can plus-sized fashion-focused gentlemen go? Chubstr.com, a Web site founded by Bruce Sturgell in 2011. Mr. Sturgell said he saw few fashion platforms that catered to a more plump crowd. So he started Chubstr, an online style guide for men whose appreciation for fashion is as large as their waist size.