6 Big Bags for Day or Night

DAY With its structured shape and sizeable pockets, Jessica Biel's Jimmy Choo bag is an unexpected (and totally useful!) briefcase.

NIGHT Buckles, studs, zippers-this carryall has attitude enough to add contrast to a pretty dress or rock out a sleek after-dark look.

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DAY Eva Longoria Parker's Birkin frame bag adds instant polish to a casual look and blends flawlessly with more tailored office-wear (and those of us, ahem, not on the Hermes waiting list can get the same effect with a mid-size structured satchel).

NIGHT With its fun color and luxe construction, the tote pairs easily with a refined evening look or a jacket-and-jeans combo.

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DAY Sarah Jessica Parker's Diane De Maria purse is a standout combo of high-voltage hue and major shine, adding a quirky touch to a blush-hued day dress.

NIGHT Add the bag to neutral pieces in luxurious textures (like a satin blouse or a suede skirt) for optimum contrast.

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DAY A floral bag like Taylor Swift's can be combined with embellished boho pieces for a laidback mix.

NIGHT Paired with an LBD, the pattern pops and the bag becomes a statement piece.

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DAY With its clean lines and short straps, Sienna Miller's Prada bag tones down the girliness of a frilly skirt or dress.

NIGHT Slung on an arm, a top-handle satchel is casual enough to pair with out-with-the-girls denim.

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DAY With its soft sides and neutral shade, Jessica Alba's Escada Sport bag is a no-fuss add to a laidback afternoon-out look.

NIGHT The masculine-inspired buckled duffle is an ideal finishing touch to girl-meets-boy separates.

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