Lace Open Crotch Thong with Side Ribbon Lace Up from Seven â  til Midnight. An added bonus on these lace boyshort wonders: open crotch and side lace-ups. Open crotch. Lace-up sides. 92% polyester. 8% spandex. Small. Size: 2-6. Cup: A/B. Bust: 32â  -34â  . Waist: 24â  -26â  . Hip: 34â  -36â  .