Seafolly Halter Bandeau Bikini Top. 29inches circumference. Cup size unsure just says size 12 Soft cups for shape and support Quick dry cups Side boning for shape definition Gripper tape to hold swimsuit in place Soft ties for comfort and fit versatility Back clip closure True to size 80% recycled nylon, 20% elastane Rinse after use Cold gentle machine wash separately or hand wash Dry in shade