Here's another maquette I did as an in-class demo at Humber College in October of 2007. This was a suprizingly fast sculpt that took only 25 hours total, painting included. I used a Letrajet (which is an airbrush that uses Letraset markers). The skin texture took about 4 hours with the flat end of a toothpick.

The overall dimensions are 12" tall x 12" long and 7 " wide. A very fun project!