FTA helmet size help

[eLKraan]

I am about the 3d print a TFA helmet that I modeled and I could really use some tips on the size (link to helmet http://www.whitearmor.net/forum/topic/34557-tfa-stormtrooper-bucket-3d-build-wip-for-printing/).

 

I have tried to calculate it based on pictures and come to a height of about 12.5" / 32cm but I am not sure if this is correct.

 

 

If anybody can give me some information about the size of the Anovos helmet or ones that came with a full kit that would be great.

 

 

I will make the model available for everybody who wants to use it after I printed it.