They are the same size as mini-CDs (8 cm) and hold 1.4 GB. Memorex have an 8cm mini DVD-RW with "DuraLayer" scratch-resistant coating. I bought a 3-pack for $15 to try out. They boot fine in my computer.BarryK wrote:...I didn't even know there are mini-dvds!
DVDs are better than CDs in another way: the data layer is sandwiched in the center of the thickness of the disk, not on the back side close to the surface where a scratch can easily obliterate it.