1524m (5000ft, as on the original design sketch
by John Eaves)
Especially thickened up to print in Steel materials.
This is the Son'a Collector Ship from "Star Trek: Insurrection", also known as Son'a Science Vessel. It has the collector sails folded in and their hatches closed. John Eaves says, that the size changed back and forth several times through the production of "Insurrection". There were multiple sizes between 2 miles (ca. 3219m) and 4000ft (ca. 1219m). In the end it was used a length of something just above 4000ft for the beginning of the movie, but when the Enterprise flies over the exploding vessel it seems closer to the 2 miles figure. I decided to ignore the inconsistent visuals and go with the 5000ft (1524m) it was designed for.
If you need this in another material, size, quantity or combined with one or more of my other parts for cheaper printing, just let me know. I will try to make it as you need.
If you want to see my custom-made Star Trek Tactics ships, visit my thread on hcrealms.com.