Well, the one I did for Yuuri took about four hours total. Something small like this? Maybe an hour, hour and a half. It also depends on if you need breaks. It can wear you out pretty fast.

[She sets up a tray before taking Junpei's wrist. First she wipes it down and then... is that shaving cream? Yes it is! She'll carefully shave the area before wiping the rest of the cream off.]

To get rid of hairs. They can mess the tattoo up with how they stick up.