The keychain is pretty small, it looks better sized up. A color change can be added and if you keep the size the same as how I made it, the color change should be at layer 18. Most types of keychain rings could work no matter how big you make it. The color that I printed it in was yellow and then black but you can customize it however you want. Most of the time, the print should take less than an hour. The small one took me 30 minutes.
The author marked this model as their own original creation.