What kind of felt would you like (Rabbit, Beaver or wool)? Rabbit is the most common high quality hat making . Beaver is top tier quality and wool is for anyone on a budget but won't last like beaver or rabbit.
Would you like a silk liner?
Would you like your hat to be brim binded (thin layer of ribbon sewn around the edge of the brim) or want a fabric underlay on the brim (fabric sewn onto the underside of the brim to cover the felt)?