Very nice 1800s Dobbs & Co top hat made of beaver and silk with grosgrain ribbon trim on the brim. Leather trim inside. Check out all the pics! 
MEASUREMENTS:
Measured around the outside on the top of the ribbon trim is 22"
Front to back on the opening is  7.75". Side to side is 6.25"
The hat is just under 6" Tall.  Including the brim it is 11.5" front to back and 9.5" side to side. 

Overall EXCELLENT condition. Fully intact with no holes, excessive wear or missing fur on the outside.  There are a couple of small dents on the side from storage. Light signs of wear a on the brim with a couple of nicks.  No rips inside, the lining is fully intact but there are sweat stains, signs of use from long ago. Please view all photos for details.