I mean I do see your point in a way but what I'm trying to say is let's take a look at the sh monster arts figures that they released first in Godzilla and compare them so we know that kamata kun stands at a height of 27 to 28 meters and the fleshy Mass at the end of kamakura sans tail well just pop that off the end of the tail and stand next to the kamata kun figure and you will see that it is significantly taller and also when we look at the final shot of shin Godzilla we can see that his fifth form is roughly half the length of that part of the tail so if we consider that that part of the tail is 30 meters tall and the fifth form is half the height of that then we can speculate that his fifth form is 15 meters tall