Using papekura to unfold models of the weapons, then comparing the completed size with the 'actual' size of the weapon.
Weapon Size Scale
M6D 26.7 30.36
MA5B 87.6 30.35
M90 118.1 30.46
Sniper 187.5 30.29
Spnkr 134.9 30.24
Av. Scale 30.342.
Gives a H2 Master chief a size of 2m19cm. Or 7'2".
I thought it would be more usefull to give everyone a set of standard armour as well as the tools they need so they could modify it to fit themselves. Just like you'd have to do with any purchased armour.
That's why I didn't put it out initially as a pdf or page images.
Fraz