envelope bags

Kate Bosworth has been wearing her JewelMint metal envelope bag ($60) for a while now — here she is showing off the gold version back in January — but finally the world can get in on it with JewelMint's new boutique collection launch. You buy the purse separately, then have fun picking out which strap you want. In this photo of Kate running errands in LA in an Isabel Marant dress and wedges, she's wearing the sea drop chain ($30) with the silver envelope bag. But you can also choose a simple chain strap or a chunkier one, too. Sign into your free JewelMint account and start perusing away.

This classic shape lends crispness to the clutch. They're also totally functional — fitting the basic necessities — and they're sleek and chic enough to carry from a day at the office to an evening out. We love the mix of prep and ladylike we saw in the clutch bags on the runway for Oscar de la Renta's Spring collection. Envelope bags are clutch (pun intended), so we've picked our 10 favorites.