Looks like the Ten Forward and similar windows are much better modelled. However, I have no idea of the size of the model from the linked image as I don't know the size of those other figures. Something like eight times the volume (twice in each linear dimension), perhaps?
You're not the only one so some guys in Facebook tried to guesstimate based mainly on the size of the base and the Mega version of the TOS Enterprise. Here are their results:
https://scontent.fath4-1.fna.fbcdn....=c8cf2bd6fae4b54d0267107a53dc07c8&oe=58DE58EC
https://scontent.fath4-1.fna.fbcdn....=80b2bdd3103c88ad137ab71199ce8ac0&oe=591FCF1C
All I can say is WOW!!!

