This is a Finger brace I disigned. Really simple. The dimensions are in the foto's. The print time is about 20 min. I recommend using PETG at the very least. It is a bit sturdier than PLA. 

First measure your finger, then adjust the model to your liking. My wife was pleased with it. She was not allowed to bend her finger, and this would help her. I hope this has been helpful.