You can also find this tutorial on Make: Projects.
Find more photos in my La Roux costume Flickr set.
Remove pockets from the jacket with a seam ripper.
Use a ruler to "square off" the corners.
Make sure the fold is at the top edge of the pocket.
The yellow and green pockets are rectangular, so I squared up my pattern before cutting the square red and blue ones.
Cut off the excess fabric and use an iron to press in a new, straighter flap. Sew with white thread.
Because the bottom front corners of my jacket weren't square, I fudged it by extending the binding out past the edge.
There's a bit of binding detailing over the shoulders and on the sides as well.
Hang acrylic pieces from a long chain.