Not quite as small as the Sony Drives, which are pretty much just a thin sliver of circuits and plastic these OCZ Roadster drives are pretty darn close. The drive consists of a little hook for a lanyard or your keychain, a USB port, and a folding plastic cover. It's shorter than the Sony drive, but has more girth—which is what women prefer, apparently.
OCZ releases super small USB key [The Inquirer]