Not sure if this is going to be exactly what you're looking for but here ya go. This is based on the hobby standards. I.E., what has been around the longest, has been used the most in mainstream America, and has the most product sold and the most available product.

Figure Specifications

Maximum Height – 38 mm or 1.5 inches (bottom of stand to top of helmet)
Maximum Length – 33 mm (rear most extremity to fore most extremity)
Maximum Width – 29 mm (left extremity to right extremity)

Hope This Is Of Some Use,
-Mike Pratt