Size is listed on tag as 6, it is a UK 6, equivalent to a US 2! Super gorgeous silk-satin slip, the red color is stunning! Never worn, only tried on! Perfect condition! From Agent Provocateur's site: Slip into something a little more decadent. Alluring Arlette is the little bit of luxury you deserve every day (and night). Sumptuously soft silk in classic, flattering cuts that work as nightwear, loungewear, anywhere-wear. Silk-satin with a little stretch for comfort Curved darts at bust for an ultra-flattering fit Adjustable rouleau straps AP logo embroidery near the hem