The Groma Kolibri certainly has a low profile. Looks like a normal '50s era typewriter that somebody's let the air out of.
Now, I recall seeing a picture of a Hermes Featherweight in Robert Messenger's book "The Magnificent 5" which shows the typewriter next to a box of matches and it gave me an idea.
So I took a quick snap of the Groma with my iPod Touch.
Yeah, that's pretty slim.