You can cut up the back of any shirt, preferably cotton/jersey fabric.
1
Print out an angel wing template. You can search "angel wing coloring page" etc., or use the file I have attached.
2
Lay the template out on your shirt where you want the wings to be.
3
Turn the shirt inside out, and put the templates under the first layer of the shirt. Trace the wings onto the shirt; tracing on a window might help.
4
Cut out the holes. Be careful, don't cut out the outline.
Also, if you use the attached template, don't cut out the top part otherwise you will get a "flap".