MEBISO designs support products for your comfort and pain relief. We believe that everyone should be able to live a healthy and active lifestyle. Our products are designed with this philosophy in mind. We invite you to try our products and convince yourself. Please don't hesitate to reach out with any questions you might have! FIT MEASUREMENTS Size REGULAR fits hip circumference 32 - 47 inches and size XL/XXL fits hip circumference 47 - 56 inches. Important: Measure right above your hips. Don't assume your size based on your pants size! Belt width: Size Regular 3.5 inches and size XL/XXL 4 inches. Unisex design: Fits Men and Women. Can be worn under or over your clothing. Relieves SI JOINT pain, SCIATICA and LOWER BACK pain The adjustable hip compression SI brace will help support your lower spine and hips to relieve pain, pressure and stress caused by pelvic instability or SI joint dysfunction. This medical grade belt is designed to effectively stabilize and support your pelvis and hips. Simply the best solution for: Sciatica, hip pain, pelvic pain, lower back pain, upper leg pain, symphysis pubis dysfunction, pelvic girdle pain or piriformis syndrome.