Size Waist (Measure male waist or female hips) 10" Wide
S 24-30"
M 30-36"
L 36-42"
XL 42-50"
2XL 50-56"
3XL 56-62"
Fitting Instructions: In a standing position, place support around your mid back and upper buttocks area. Pull both side straps evenly until the support is snug. Keeping the support snug in the back, overlap the side straps and fasten the closures. We recommend readjusting periodically throughout the day or as needed. A snug but not tigh support does the best job.