Well, they can be made in two different sizes, as seen in my photobucket. Large ones (Quinn) made with plastic canvas and yarn. Smaller ones have better color selection, in DMC threads. Take about 5-7 hours to do.
No, i usually do it while watching tv. Helps make the time go faster.
Oh, and have only sold 1 so far on eBay. A Joe Montana one. Even had the Peyton Manning on there and no sale. Go figure!