This is the coat he wears in all four of the movies (so far), underneath his cloak. Most of the time he wears the cloak over it, but in the dueling scene in Goblet of Fire (with Gilderoy Lockhart) it is most clearly on display.

The most unique part of the design is the sleeves, which have a dozen buttons each, and are slightly puffy at the top, but fitted from the elbows down, and flare at the end. All of the buttons are functional, and custom covered to match the fabric of the coat.

I made the wand rather quickly the night before the con, out of cardboard and parchment paper. The handle was carved with a dremel, and the stem lit up with an LED inside.