Sonia by Sonia Rykiel's strapless dress redefines party style. Play up the zip details with strands of jewelry and a studded clutch. Indigo silk-crepe. Sweetheart neckline, black raw-edged ties with silver rivets, boned corset-style bustier, two square front pockets with silver zip fastenings and black trims. Internal hook-fastening grosgrain strap under bust, concealed hook and zip fastening at side. 100% silk; padding: 100% polyester; lining: 100% cotton. Dry clean. Fits true to size. Take your normal size. Fitted at the bust and waist; loose at the hip. Mannequin height is 180cm/ 5'11" and is wearing a US 4.