This is a Double Closet dress. I've worn it about three times and have home-laundered it. The top is made of T-shirt material, the waist has glittery elastic, and the skirt is made of cotton. The size listed on the tag is free size, but someone who usually wears a size M wore it. Flat measurements are: length approximately 79cm, pit-to-pit width approximately 40cm. Please note that there may be some slight variations.