Buffalo's 16GB ''nail'' sized drive

You can't really call such a small thing a thumb, can you?

The new 5mm USB flash drive is available in 2GB, 4GB, 8GB and 16GB versions - surprising, given it's miniscule size.
The flash chip seems to be lodged on the USB connector itself. There's not much space elsewhere and, as you can see, it has a thicker bottom half.

Source: VR-Zone