This helps you understand why starship models are presented in the thousands scales.
1/2000, 1/4000
And in case you didn't know, scale size basically means "it takes 2000 of the little models, end to end, to equal the real thing size. Thats 1/2000 scale"
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Now look at this (Enterprise compared to a Borg Cube) below.
The Enterprises are underneath the Cube.
It is hundreds of times larger...in volume...than the Enterprise (the big Enterprise!).
Now try to imagine just how big a model would have to be, to be in scale with a 1/2000 Enterprise (or even a 1/4000 Enterprise!).
The option is going to a much smaller scale.
A scale that would make your Enterprise model very very small.
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So, first you must know the scale of your starship model. Lets say the AMT 1/2500 scale Enterprise.
Then measure your starship model. Its 10" long.
That means the "real" thing is about 2083ft (more than a third of a mile!).
Based on the image above, the cube appears to be 5-6 times longer than the Galaxy Class Enterprise.
So that makes the cube upwards of 12,498ft or 2.35 miles on each side.
So that means, at 1/2500 scale (the same as the Enterprise model), the cube would be 5ft square. (or there abouts)