\newcount\fs
\def\sz#1#2{\fs=#1#2
\ifnum\fs=10\fontsize{10}{12.5pt plus.2pt minus .1pt}\selectfont
\else\ifnum\fs=11\fontsize{10.95}{17pt plus.3pt minus.2pt}\selectfont
\else\ifnum\fs=12\fontsize{12}{18.5pt plus.3pt minus.2pt}\selectfont
\else\ifnum\fs=14\fontsize{14.4}{20pt plus.4pt minus.3pt}\selectfont
\else\ifnum\fs=17\fontsize{17.28}{22pt plus.4pt minus.3pt}\selectfont
\else\ifnum\fs=20\fontsize{20.73}{28pt plus.5pt minus.3pt}\selectfont
\else\ifnum\fs=25\fontsize{24.88}{33pt plus.5pt minus.3pt}\selectfont
\else\ifnum\fs=09\fontsize{9}{11pt plus.2pt minus.1pt}\selectfont
\else\ifnum\fs=08\fontsize{8}{9.5pt plus.2pt minus.1pt}\selectfont
\else\ifnum\fs=07\fontsize{7}{9pt plus.2pt minus.1pt}\selectfont
\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi}
