Don't get me wrong, I love the idea of living in small spaces. I write about them all the time. But the Keret House is 122 cm (48.031") at its widest, 72 (28.34") at its narrowest. I know people wider than that.
I also complained that "It's like living in a squished ping pong ball." But the architect explains that this was on purpose; the walls are made of translucent plastic to let in light. The whole thing works a lot better than I ever thought it would.