Intimately by Free People Purple Mini Dress -No Tags -Zipper along the side of waist -Small peephole designed at center of bust -Beautifully lined in a what feels like cotton slip -Adjustable spaghetti straps. Flat Lay Measurements 20 inches pit to pit 18 inches waist 20 inches hips 31" length from armpit to bottom hem See measurement guide from the manufacturer's website in my photos. I will GUESS that this is between a Medium or Large size. Based on other dresses of similar design by Intimately FP this is MOST LIKELY but NOT Guaranteed: 100% cotton and maybe viscose. Machine wash Cold to be safe and line dry until you know the fabric and how it will react to washing. From Manufacturer: Free People invokes a spirit of femininity and creativity. Throughout their line of sweaters, tees, dresses and more, each piece incorporates a high level of quality and originality that reflects their adventurous it girl. With all that's constricting in the world today, Free People says your clothes don't have to be. Be yourself, be creative, be free.