Kudos to an article and author which focus on the metric data and give Customary as an aside: http://www.maximumpc.com/article/news/toshiba_claims_500gb_canvio_slim_worlds_thinnest_portable_hard_drive ". . . the new Canvio drive is supposedly the world's thinnest portable model. It's just 9 mm thick, which is ever-so-slightly chunkier than a Samsung Galaxy S III (8.6 mm), to give you a point of reference. The drive is also 107 mm long and 75 mm wide, which coverts to 0.35 inches by 4.21 inches by 2.95 inches, if you have an aversion to the metric system." The conversions are even done to appropriate significance.
