If you sell prints of these models, you must be subscribed to my Patreon to maintain a license: https://www.patreon.com/thomastedwards
This little keyring is based on my larger Articulated Kohaku River Spirit model. It has some articulation, but the legs do not move.
I would not print it any smaller than the provided file. I also would not use it on items that go in a pocket or a bag. It's best used on the outside of a bag.
Due to the limit of 4 colours, the pupils are not black. A dab of acrylic or permanent marker works fine.
If you'd rather not have it as a keyring, simply delete the negative cylinder part as shown in the picture, and you're good to go! (both Kohaku and Shenron have the hole in the same place)
I printed mine without a brim; providing your hotbed is clean/freshly glued, you shouldn't need a brim either. Supports are not needed for this model; do not use them or the model can break when you remove it from the supports!