This is the perfect costume for the Mad Hatter. It is very classical but elaborate in a sense. It's very classical and quirky. The costume completely matches the Mad Hatter's craziness and comical nature.
'Alice in Wonderland' White Rabbit Concept Art by Michael Kutsche. It's beautifully done and the rabbit looks smart in its costume. His outfit, together with its neck clock, creates mystery and the mood of the foretime.