The Micro Ettins are an unofficial ettin breed created by Trix. They're the same as normal ettins, just half the size. With the passing of the CCSF 2006, you can now also download a very nice smiling variant of them and a patch which solves the evil error that had the females go bodiless while they were pregnant. They can be found for download at the Universe of Ettins.
See also the Creatures 2 version.