2000Feet..... I was ??? lost, only twice the length of the Refit Enterprise (this was before TNG and the 2000ft Galaxy class,
Later when I originally saw 4150ft I was a lot happier with that scale.. for years it was the scale I liked.. but doubts raised by other, I used the models you see to explore the scale as best I can..
The lowest length scale I now support is 6080ft.. as I said.. it could be larger.. how big, well your preference
is as good as mine