An oversize bag is dangerous because it invites you to carry tons of stuff, but it isn't intrinsically worse than a small one. Shape and dimensions matter less than how the bag meshes with your body, the doctor says. If it's on your shoulder, it should automatically find the sweet spot between your side and arm. If it's over your forearm, it should be right at your waist (which means women with long torsos or a lot of height can afford a deeper bag).
Declutter your life! Our March issue features a complete guide to streamlining your life, from Peter Walsh's 30-Day Organization Challenge to innovative ways to clear your mind. Plus, go behind the scenes of Oprah's yard sale and find out how you can improve the world with a simple "hello."