Before the end of the year, Macy's and Bloomingdale's will offer custom tailoring for clothes you purchase online. How does that work? Well, thanks to a new startup from Men's Warehouse founder George Zimmer, you just buy the clothes, and when they're delivered a tailor comes to you to ensure the proper fit. As you might expect, the on-demand option is only available in certain areas... for now. Los Angeles is the first pilot city, with other trials planned for New York City, San Diego, San Franciso and the states of Washington, Oregon and Florida. Don't live in any of those places? Fret not, the option is set to go nationwide this fall.