Do you have one of those tables or chairs that use a tube as legs?
Then you may need this parametric foot.
I created this because a colleague at work has such a chair and one of the plastic feet broke.
Since he has a linoleum floor he needed a replacement and asked me for one.
Here it is...
The OpenSCAD file has five constants that determine the size of the foot.
Simply change to fit your needs, press F2 (save), F6 (compile) and then export to an STL file.