The Brona blouse from the French brand ba&sh is made of 100% cotton. It is designed with a ruffled collar and sleeve cuffs, beautiful lace details and mother of pearl buttons – a timeless but also unique piece with bohemian chic that reminds of French classic and effortless fashion. The size is 0 which is equivalent to a size XS. The blouse is new with tags, has never been worn and comes with an extra button. You can see it on the ba&sh website here: https://ba-sh.com/us/p/shirt-brona-ecru-1E25BRON_ECRU.html