WHAT DID AUDREY Hepburn, Diane Keaton (in “Annie Hall”), Jane Birkin (before Hermès) and Brigitte Bardot have in common? They all mastered the art of casual chic with a straw or raffia bag on their arm. We hadn’t even thought about this summer classic until the Wall Street Journal brought it to our attention last week. Thank you, WSJ, for the timely reminder. It got us thinking we could also find some swell examples (see above) for you before the season’s over. Updates on the plain-Jane basket style include flirty fringe, pompoms, embroidered messages, curvy round shapes, stripes and splashes of color. Carried as a clutch, as a tote for beach gear or worn over the shoulder, this accessory is an instant pick-me-up, and one that doesn’t cost a fortune. Moreover, it goes with just about anything you already have in your closet. Woo-hoo.