Those handy USB memory drives -- which have largely replaced "floppies" for the quick-and-dirty transfer of files from one PC to another -- come in a variety of sizes and storage capacities. The current smallest size, and also the largest capacity, memory drives have been unveiled by two different companies at the giant German trade show, CeBIT.

The aptly named Petito USB Key is about the length of a quarter and a half, but stores an impressive 1 gigabyte of files (or, optionally, a cheaper drive stores half that).

If massive storage, rather than tininess, is your thing, you should also know about CellDisk, a 16-gigabyte device from Iocell. It's about the size of a standard USB key, so it's not some giant thing.

There you have it: The current record holders for the smallest -- and the "biggest" -- USB memory drives.