Earning extra credit is always fun! This School Girl costume includes a stretchy halter-top, plaid skirt with open back, ruffled back panties and matching necktie. One size fits most. School days have never been better! Size OS. Cup B/C; Bust 32â  -38â  ; Waist 24â  -32â  ; Hip 34â  -40â  . 90-160lbs.