7" X 8" flexible urethane that was cast from a laser etched piece. These are a little imperfect but are still super cool! These could be sewn onto fabric as a patch- try to space the thread far enough from the edge so that it doesnt rip the material with flexing. You could also adhere it to fabric using Black Panther from smooth-on- roughen the back of the patch before gluing. There may be less expensive flexible urethane adhesives out there but this is the brand that works the best for me.

Each one has a color shifting effect!