I would like to draw small (although visible) vertices with package tkz-graph. I tried with MinSize, but this is a lower bound on the size, and I am looking for an upper bound. In the following example, it seems that when MinSize is below the lower bound that is in the package, no further reducction occurs.
\documentclass{article}
\usepackage{tkz-graph}
\begin{document}
\foreach \x in {10,...,1}{\SetVertexSimple[MinSize=\x pt] \tikz \Vertex{A};}
\end{document}

\tikzsetto set both inner sep and minimum size. – ASdeL Sep 10 '15 at 16:47