DOKK / manpages / debian 12 / stlcmd / stl_borders.1.en
STL_BORDERS(1) User Commands STL_BORDERS(1)

stl_borders - stl_borders prints how many border edges there are in a given STL file.

stl_borders prints how many border edges there are in a given STL file.

usage: stl_borders [ <input file> ]

Prints how many border edges there are. For a watertight, manifold model, it will be 0.
December 2017 stl_borders v1.1