The # 5 pattern Nipple wrench/combination tool  is stated as being smaller than the # 4 pattern, but I haven't been able to find any measurements attributed to these.
 
I was wondering if anyone here has been able to acurately identify these two patterns (they both come in Sergeants & Privates versions) & if so what the overall comparative sizes are of the shank & arms?
 
I'm trying to work out which one I have.
 
Thanks, Adrian.