\begin{tikzpicture}[x=1ex,y=1ex,baseline={([yshift=-.5ex]current bounding box.center)}]
    \coordinate (v);
    \coordinate[above left=1.3 of v] (v1);
    \coordinate[below left=1.3 of v] (v2);
    \coordinate[above right=1.3 of v] (v3);
    \coordinate[below right=1.3 of v] (v4);

    \draw (v1) to (v3);
    \draw (v2) to (v4);
    \filldraw (v1) circle(1pt);
    \filldraw (v2) circle(1pt);
    \filldraw (v3) circle(1pt);
    \filldraw (v4) circle(1pt);
\end{tikzpicture}%