These are actually wearable (at your own risk!) EU size 38 low poly high heels. Simply print them out (remember to mirror the shoe for the left foot!) add a matching string to bind the shoes to your feet and you are, literally, ready to go!
Make sure you have thick walls so that the shoes doesn't collapse. Also try to print the shoe laying on its side so that the raised heel won't break off (which it will if you print it standing up)
The author hasn't provided the model origin yet.