Our Tie-Back Bandeau Bikini top has an unstructured bandeau style top with a versatile cross-back tie detail that allows for flexibility in coverage and fit. S/M fits Extra-Small to Medium size (AA to B) and L/XL fits Medium to Large size (C - DD) depending on how much coverage you prefer. 20% lycra / 80% poly with 4-way stretch. Made in Sunny California!