\shapepar is a macro to typeset paragraphs in a specific shape. The size is adjusted automatically so that the entire shape is filled with text. There can be no displayed math, and no "\vadjust" material (no "\vspace"). These macros work for both LaTeX and plain TeX. For LaTeX, specify \usepackage{shapepar}, or for Plain, \input shapepar.sty. The author is Donald Arseneau. See also shapepatch.