Chicastic Sexy Black Satin Under Bust Corset Lace Up Bustier With Thongs - Extra Large. Satin Under Bust Bustier. Sexy Lace Up Bustier. Strong Plastic Boning. Our corsets run smaller than regular sizing, so please view our Size Chart carefully. Corset sizing works different from other clothing. If you have any questions about the measurements please feel free to call our customer service at 1800-568-6975 - 8 AM - 11 PM (All 7 days).