DETAILS 

Field Marshal Montgomery for whom the hat is named wore a Kangol® Beret as he commanded Allied troops in World War II. This Kangol® military beret has made a fashionable transition from the battlefield to the streets.
Hat Size Measurements 
Small (S) = 6 3/4 - 6 7/8
Medium (M) = 7 - 7 1/8
Large (L) = 7 1/4 - 7 3/8
X-Large (XL) = 7 1/2 - 7 5/8