Since people remark so often about how tiny the brushes and pens I use must be, I thought it might be fun to share their real sizes with you. Maybe they aren't as tiny as you thought...or maybe they're tinier!
On the left are my four favorite sizes of brush to use. 00, 10/0 script, 10/0 liner, 1. Although there are much smaller brushes available (yep, I own them too), they aren't as easy to manage as longer hairs. The longer the hairs, the easier it is to draw them to a fine point and that's exactly what I often need. On the right is a standard size pencil and number 5 paint brush, a more typical size.
The pens I use are really where the "tininess" is at. These two pens are sizes 003 and 005. The ultra fine point Sharpie pen next to them would be about a size 05 or 1mm wide. They are very tiny and easily mashed if you're not careful with them.
Pens and brushes together! They might be small, but they help me create all of my pieces.