ADJUSTABLE SIZE:
Adjustment from 28 to 48 Inch in chest circumference.Figure 8 Back Posture Corrector with breathable and latex-free adjustment strap.
Small: For kids or small adults 90 lbs - 140 lbs (40 kg - 64 kg)
Medium: For adults up to 150 lbs - 180 lbs (68 - 82 kg) .
Large: For adults between to 181-225 lbs (83 kg - 102 kg).
XL (Extra Large): For adults between to 226-265 lbs (103 kg - 120 kg)