I just had an old Stetson Open Road worked over (boy, did they work it over--they used enough stiffener to turn it into an army helmet,) and I've been meaning to ask some of the experts here why the brim sizes of Open Roads seem to differ. This reworked hat that I'm wearing as I post, actually a Stetson 25, has a 2.5 inch brim. My later Open Road has a 2.75-inch brim. Those vintage Open Road adds often show the hat I'm wearing now, with an obvious 2.5-inch crown. And I've noticed that many of the Open Roads on eBay show both brim widths. Has anyone noticed these brim width differences? Are the wider brimmed Open Roads newer? Also, the older versions, like mine, seem to have, with a cattlemen's block, a 4.5 inch crown, shorter than my newer hat. Do these differences indicate different models? Should I have my doctor increase my medication?