Guess's beautiful no-wrinkle open-back dress size M is in excellent condition, like new, with no defects or signs of wear. It has straps. The contents are rayon & polyester. Polyester is durable and lightweight, wrinkle-resistant, dries very quickly, retains its shape well, is highly stain resistant, easy to clean, stain resistant, sleek & has superior elasticity. Benefits of rayon The fabric is soft and thereby comfortable to wear. The fabric has a beautiful, luxurious appearance. The fabric absorbs moisture and water well and stays cool and airy in warm weather. The fabric is wrinkle-free. The fabric retains its shape and colors well. ALL OFFERS WELCOME Measurements are estimates We lay the dress down flat. This dress is stretchable. The sleeve is 0 inches from the shoulder seam to the bottom of the sleeve. The chest is 14.5 inches between the seams under the armpits. The waist is 13.5 inches across. The Length is 34 inches from the shoulder down.