You have good reasons to avoid the dressing room — long lines and fluorescent lighting among them — so skip it altogether by �sizing yourself up first at home,� says designer Cynthia Rowley. Note how your favorite clothes look when you hold them to your body, and recall that when you�re shopping. If the fabric of a pair of jeans or a skirt doesn�t exactly meet the edge of your waistline when you hold it up, it won�t fit correctly, Leah Feldon says. And the next time you�re in a hurry at the department store, remember this measurement trick from Rowley: The distance from the side of your neck to the tip of your fingers (on an outstretched arm) is about the same length as your inseam.