Here is a snip from the press release:
The figure was created at the Madame Tussauds Studios in London specifically for the Las Vegas attraction. Master Chief stands at an impressive 7'2" tall, with an approximate finished weight of 275 lbs. A total of 10 studio artists worked on the massive figure, dedicating an estimated 892 man-hours for the finalization of the stoic soldier. Total man-hours included 687 hours for sculpting, 168 hours for molding, and 37 hours for painting. Materials included over 1,000 pounds of clay.
May I be one of the first to say, congratulations Master Chief.
Here he is in all his wax glory (and some strange guy in a hat):