The World’s Smallest Bluetooth 2.0 Dongle
Aug 24, 2007

Too bad Japanese usually isn't found in the vocabulary of English speakers, else we'd be able to understand this product page easily.
Yes, there's Google Translate, but it doesn't exactly do a great job of Interpreting the limitless subtleties of language. In any case, from what we can read, this Princeton Bluetooth 2.0 (EDR) dongle's dimensions are 14 x 19 x 4.5mm (width, depth, height).
That's right: this is a piece of technology that barely occupies more space than a sugar cube. Perfect for keeping your smartphone or PDA linked to your Bluetooth-less PC or laptop!