Spirit Halloween Mens Size Chart
Some costumes may run small. When trying to decide between two sizes, choose the larger size for a better fit.
  Chest (in inches) Waist (in inches)
SMALL (FITS CHEST SIZE 36"-38") 38" 32"
MEDIUM (FITS CHEST SIZE 40"-42") 42" 36"
LARGE (FITS CHEST SIZE 44"-46") 46" 40"
XL (FITS CHEST SIZE 48"-50") 50" 44"
STANDARD (FITS CHEST SIZE 46) 46"  
PLUS (FITS CHEST SIZE 52"-54") 54" 48"