Now I own one of these. It's about an inch wide and about an eighth of an inch thick. It holds exactly 1 million times as much information as the first one (yes, it's a different sort of memory, but it still works out.)
By the way--when you say "eighth" out loud, do you pronounce it "tth", that is, with a hard t followed by the th sound? Or do you simply pronounce it with the th sound?