This is a simple shim for your toilet, it is ¼" at the highest point. I printed mine out of tpu so it is very durable

I recommend printing at 0.2mm or higher so you get that staircase effect, that will help the shim stay in place. All walls and no infill (just put 30 walls)

If the shim doesn't fully go under your toilet you can easily cut in with an utility knife, after the caulking it will be totally invisible