For those who have tied them, or bought them, how wide should the head be? Say on a #4 TMC 5262.
I’ve got the article sitting right here and although it doesn’t specify, it looks like it’s as wide as the hook gape (he uses a Tiemco 5263).
Regards,
Scott
buy a sample then you will know for sure 
What is a Moorish Mouse?
http://www.flyfisherman.com/content/mastering-mouse
Regards,
Scott
Basically a moorish mouse is rabbit zonker and craft foam… I have played with it a bit in a use for musky flies and like the idea… easy to tie too. Hopefully someone will add a picture and you’ll see more closely what he’s referring to.
Looks like Scott beat me to the punch!!
Steve
It’s a little known fact that the Moorish Mice were kicked out of Spain in 1492.