To select the right size, take the circumferential measurement around the waist. Use the measurement chart to determine the most suitable size.The brace are fitted with two metal splints. They are located in the back, the two open pockets.Indications: The product has been design to provide lumbar support and stability.Contraindications: Patients with instable fractures should use a more stable brace.The product should be fitted by medical professional like an occupational therapist, physical therapist, orthopedic technician or a medical doctor.