This has to be one of the smallest USB drives in the World, the Elecom MF-SU2 USB Thumb Key.
The Elecom MF-SU2 USB Thumb Key measures 18mm by 15mm x 7mm and weighs in at a tiny 2.5g, but being small doesn’t mean it cant store a decent amount of data.
These tiny USB drives come in a choice of either 4GB or 8GB, and have built in password protection to make sure all your data is secure.
There is no word on pricing or availability as yet.
Akihabara News via 2dayBlog, TechChee