I designed this as a quick pass-through opening in a standard 14mm drop-ceiling acoustical tile. It will fit larger tiles if required. Print at low-res and press-fit together. As is, the fit is very tight…I recommend printing the outer ring at 101% for an easier fit without loss of friction.
I do not recommend excessive scaling. If you'd like to remake this at a different size, the Tinkercad source files are publicly available.
Two files: Inner and outer ring. Print outer ring at 101% for easier press-fit. Mark and cut tile based on outer ring.