This is a model done for all of the Ace cosplayers who don't wanna spend money in a sticker tattoo or don't wanna paint themselves the tattoo, giving a chance of it being a disaster.
It is exactly the tattoo Ace has on his arm, the ratios are the same he has.
The usage is very simple: Just put some paint over it and stamp it on your arm. (I reccomend body paints or eye liner paint).
You may need to scale it up a little bit, as it is designed for a small arm.
I reccomend turning on ironing on just the topmost layer, as it will give a much smoother stamp, and the overall quality of the tattoo will be higher.
Using flexible filament may give better results on stamping, since it will adapt to your arm.