A very nice all around outdoor activity hat the Sturgis is from Stetson's Crushable Wool Collection.  This Cordova (brown) hat is constructed of 100% premium crushable and water resistant wool and has a 4" (approx.) pinch front crown and 3 1/4" brim. Features include a brown leather band with lacing and a moisture wicking DriLex sweatband.

Approximate sizing guide:

S - 6 3/4 to 6 7/8

M - 7 to 7 1/8

L - 7 1/4 

XL - 7 3/8 to 7 1/2 

XXL - 7 5/8

The closer you are to the upper limit the better the fit.

Foam sizing tape is sent with each hat to snug them up if necessary.