Should fit into a drain of around 50mm in diameter.
The print is split into 2 parts in order to print cleanly without supports. I experimented with snap fit design, it takes some fiddling to put the two pieces together but it works better than i expected.
I printed it at 0.1mm layer height in Prusament PETG clear on Prusa MINI+
I got rather heavy stringing inside the perimeter holes which was simple to clean up with a knife.
The author hasn't provided the model origin yet.