Pregnancy Belt with Sacro-iliac Support Blue Small by Trainer' Choice Trainer's choice 509 pregnancy belt is for acute / chronic sacro-iliac joint dysfunction and low back pain associated with pregnancy. an added neoprene abdominal sling for support stabilizes the sacro-iliac joint and reduces pain in the lower back while supporting the abdominal girdle. adjustability allows belt to modify as size changes. Helps reduce pain in the lower back caused by si sacroiliac dysfunction while also supporting the abdominal girdle Durable and comfortable to wear Small Fits 28-40 inches "Measure 2 Inches Below Waistline