I'm wearing a medium in this bathing suit It is fitted. The material is a very durable crochet material that will last you along time...The bathing suit ties behind the neck and also ties around the back of your back so you determine how tight you want it to be.. The bathing suit is lined in the crotch and butt area as well as the boob area. The see thru cover up robe is made with a sheer material and has white marble beads all over it. The marbles don't come off..The robe splits on both sides and has a draw string so if you want to wear it closed you can tie it closed.