For a fresh twist on the timeless A-line dress, Oscar de la Renta's version features splits through its sleeves and an open fold detail to the front of the skirt. Made in Italy from stretch wool crêpe, the graceful design boasts a belt at the waist, bolstered with a chunky rectangular buckle, that'll allow you to get the fit on point. Match the ultramarine hue to a pair of coordinating marabou-trimmed sandals for a peppy party look.