Tool Stand Design - How Wide & Deep for Stability?

[N00b Machinist]

Have you a good rule of thumb for dimensions of a tool stand, specifically width and depth? Height, while obviously relevant to stability, is a rabbit hole unto itself.

I'm looking to build stands for power tools, e.g., drill press, miter saw, and portable table saw. With large blades and bits going around and around really fast, however, I'd prefer they not topple during use. And I don't want to drive bolts through my new garage floor. Clearly, wider and deeper is better, but floor space is limited and I'd like to keep the footprint reasonable, if not to a minimum. I've looked around the 'net for guidance and while the optimum height for a given tool discussions rise to the level of religious debate, not much "out there," that I've found, on the subject of how best to determine how broad and deep.

Suggestions?