Measure at waistline.
Measure from the small of your back, sloping downward to a point 3"- 4" below your navel. For men, this is your pant size.
Choose a Short Torso (ST) model if you have less than 1" of space between your ribs and hips.
Rated the #1 motorcycle back brace by Motorcycle Consumer News.
Recommended for: motorcycle kidney belt, motor sports back brace, motocross lumbar support.