I made a mini Kaiju No. 8 head sculpt to practice my skills and I found the character design so cooool. About 4x2x2 cm, can be scaled since I detailed it a decent amount. I was working on a full body, but the less you know bout that disaster, the better. Feel free to do whatever you want with it, I might make a mask version later.
Edit (19-06-2024): Added a mini13 mask variant, but I haven't had the chance to test it yet, so use it at your own risk.