\begin{tikzpicture}[font=\sffamily,>=latex]
   \def\text{\scalebox{10}{Xy}}
   \sbox\mybox{\pgfinterruptpicture\sffamily\color{black!25}\scalebox{10}{Xy}\endpgfinterruptpicture}
   \def\HEIGHT{\ht\mybox}
   \def\WIDTH{\wd\mybox}
   \def\DEPTH{\dp\mybox}
   \def\LLX{.15\WIDTH}
   \def\LLY{.5\DEPTH}
   \def\URX{.15\WIDTH}
   \def\URY{.25\HEIGHT}
   \draw [gray,thin]
        (0,0)       -- +(-3.5ex,0)
        (0,\HEIGHT) -- +(-3.5ex,0)
        (0,-\DEPTH) -- +(-3.5ex,0)
        (\WIDTH,\HEIGHT) -- +(3.5ex,0)
        (\WIDTH,-\DEPTH) -- +(3.5ex,0)
        (0,-\DEPTH)      -- +(0,-3.5ex)
        (\WIDTH,-\DEPTH) -- +(0,-3.5ex)
   ;
   \node [inner sep=0pt,anchor=base west] {\usebox\mybox};
   \draw (0,0) -- (\WIDTH,0);% node [above,midway] {baseline};
   \draw [->] (-2.5ex,0) -- +(0,-\DEPTH)  node [midway,left] {depth};
   \draw [->] (-2.5ex,0) -- +(0, \HEIGHT) node [midway,left] {height};
   \draw [<->] (\WIDTH,-\DEPTH) ++(2.5ex,0) -- +(0,\DEPTH+\HEIGHT) node [midway,right] {totalheight};
   \draw [<->] (0,-\DEPTH) ++(0,-2.5ex) -- +(\WIDTH,0) node [midway,below] {width};
   \fill (-2.5ex,0) circle (.5pt);
   \begin{scope}[blue,every node/.append style={inner sep=2pt}]
    \begin{scope}
        \clip ([shift={(\LLX,\LLY)}]0,-\DEPTH) rectangle ([shift={(-\URX,-\URY)}]\WIDTH,\HEIGHT);
        \node [inner sep=0pt,anchor=base west,color=blue!50!white] {\text};
    \end{scope}
    \draw ([shift={(\LLX,\LLY)}]0,-\DEPTH) rectangle ([shift={(-\URX,-\URY)}]\WIDTH,\HEIGHT);
    \draw [->] (\LLX,-\DEPTH)   -- ++(0,\LLY) node [right,midway] {\scriptsize lly};
    \draw [->] (0,-\DEPTH+\LLY) -- ++(\LLX,0) node [above,midway] {\scriptsize llx};
    \draw (\LLX,0) -- ([shift={(-\URX,0)}]\WIDTH,0);
    \draw [->]
        ([shift={(-\URX,0)}]\WIDTH,\HEIGHT) --
        ([shift={(-\URX,-\URY)}]\WIDTH,\HEIGHT)
        node [left,midway] {\scriptsize ury}
    ;
    \draw [->]
        ([shift={(0,-\URY)}]\WIDTH,\HEIGHT) --
        ([shift={(-\URX,-\URY)}]\WIDTH,\HEIGHT)
        node [below,midway] {\scriptsize urx}
    ;
    \path [fill=white,draw] (\LLX,0) circle (1pt);
   \end{scope}
   \draw [thick] (0,-\DEPTH) rectangle (\WIDTH,\HEIGHT);
   \path [fill=white,draw=black] (0,0) circle (1pt);
   \path let
        \p1 = (current bounding box.south west),
        \p2 = (current bounding box.north east),
        \p3 = (0,-\DEPTH),
        \p4 = (\WIDTH,\HEIGHT)
   in
        (\x3-\x2+\x4,\y3) rectangle (\x4+\x3-\x1,\y4);
\end{tikzpicture}
