éSize from US size S to XL. Size S - US 6 - 8, Size M - US 8 - 10, Size L - US 10 - 12, Size XL - US 12 - 14, Size XXL - US 14 - 16. The back is hook and eye closure, allows a slight adjustment. Lingerie runs smaller than other clothing. Please choose the upper size if you are not quite sure about the sizing.é