The Etymotics are tiny -- with the flanged tips, it takes me a while to get them out of my ears, because I'm being extra careful not to pull on the cord. There's not a whole lot of "real estate" to them -- mostly wires and tips. However, with the foam tips, they don't insert so far, and are very easy to put in and take out (plus I prefer how they sound this way), if that makes a difference for you.
The new Senns seem intriguing ... but if you find them too small, I don't know about the Etys unless you restrict yourself to using the foamies (which is not such a bad thing).