aa2007 size chart

Measure under arms around the fullest part of the chest.
Be sure to keep tape level across back and comfortably loose.

Measure around natural waist with a measuring tape.

Unisex Sizing Chart (Close to Men's sizing)

Sizing S M L XL 2XL
 Chest (inches) 34-36  38-40  42-44 46-48  48-50   
 Waist  (inches)    30-32  32-33  33-34 36-38  40-42