Zune stacked agains the Zen Vision:M, iPods 5G and nano, and the Sansa E200 series. Just because it's taller than the rest doesn't mean it's larger than the rest though; we actually found the Zune to be deceptively small, and still quite pocketable. But hey, that's just us, we're the peeps prepped and ready to rock a Universal in tight jeans.
P.S. -In case you're wondering, the screens only "lit" on the Zune because it's a non-functional retail display unit.