The formula they appear to use, puts larger size when nose smaller relative to hands & feet. You'd think that XXL size everything would generate the largest number, but only yields 6.2" or some such when you pick everything XXL. The largest number I could get was 9.9" using small nose & XXL hands & feet.
Actually, the nose measurement is how far the nose protrudes, therefore blacks who often have broad flat noses would be able to use the "small" nose calculation ........ Hydromaxmm....