This stunning M&S Autograph chiffon dress in size 12 features a beautiful floral pattern, round neck, short sleeves, and a knee-length shift style. The dress is made of polyester material and is machine washable, making it easy to care for. Perfect for a casual summer occasion, this multicoloured dress is a versatile and stylish addition to any woman's wardrobe. Ideal for a day out or a casual summer event, this dress from Marks & Spencer is a chic and comfortable choice for the warmer seasons. the length is 34 inches. the width from armpit to armpit is 20 inches.