How can I select parts smaller than a size I set?

ok I am making a tanooki script from mario, and I want to only delete parts under a certain size,

This isn't how it's done but this is how I can try to explain it:

if Part.Size >= Vector3.new(10,10,10) then return end

Again, I'm not an idiot, I know that's not how it's done, but it is how I can probably explain it a little better.

If anyone can help me out here, I'll really appreciate it