Tiny drill bit

The tiniest drill bit for a regular drill we have is 2mm in diameter. We do have smaller ones, but those are more for a "dremel".
For comparison I have put the bit above our largest drill bit, it's 22mm in diameter. (Okay, we can drill wider holes, but that would be with a hole saw, or a spade.)
Thanks to sk for hosting the Tiny Tuesday challenge this month.