Fashion experts caution against wearing white: it can mercilessly add pounds and get as dingy as the Yankees home plate. But one way to wear the summer “it” color with ease is over your shoulder. The big white bag–effortlessly elegant at the office or the café–is a study in versatility.Tracy Bay by Chloe, $1,755; at Bergdorfgoodman.com. Tod’s Carey Tote Media Bag, $1,245; at Neimanmarcus.com. Elisha by Kooba, $535; at Kooba.com. Marc Jacobs Christy Calfskin Hobo, $995; at Saksfifthavenue.com. Anya Hindmarch Elrod Pecary, $975; at Anyahindmarch.com. Michael Kors ‘Popart’ Shopper, $298; at Nordstrom.com.