O'Treaty's Top Hat
I custom made Patrick O'Treaty's top hat, as opposed to trying to find something that would work, so it would be the perfect fit and closer looking to the silly, overly tall one from the sketch.
As usual, it's a cheap-o budget prop. Foam core for the frame, then wrapped with glued on tin foil. I wanted it to be beat up and well worn looking, so this kind of crude, imperfect construction actually helps.
After painting it a dark green and adding a band/bow made from ripped strips of heavy black fabric, it was coated in spray glue and I literally shook handfuls of dirt from the backyard over it. I finished it with a fall leaf where a feather might go.