800m (Estimation, based on size of the Sovereign Class)
Due to its size only available in non processed materials. There are also several sprues inside to prevent the whole structure from bending and also protect it during shipping. They need to be removed. Be sure not to remove the "double struts" in the top structre. They belong there ;-)
This is the drydock, the Enterprise-E is getting repaired in, at the end of "Star Trek: Nemesis". The dock has a structure in the middle that can dock with the Shuttlebay of a Sovereign Class, forming a physical connection and allowing personnel and material to switch between the ship and the dock comfortably. Although Ex-Astris-Scientia gives the length as some 900m, i made it only 800m long. I placed a 3D model of the Sovereign Class into it, and it looked much more like in the movie this way.
If you need this in another material, size, or quantity, send me a message. I will try to make it as you need. Be sure to read my comments below my shop page