These classic bikini panties feature ruching on the center back to shape and accentuate. They are made with a soft, breathable cotton fabric that is comfortable for everyday wear. They provide moderate back coverage for any range of activities. Available in assorted colors. General sizing guide corresponding to US pant size is: Small (0-2), Medium (4-6), Large (8-10), X-Large (12-14). Made of 92% Cotton and 8% Spandex. Machine wash, tumble dry low.