260m (based on the assumption that the saucer is about the same diameter as on the NX and the TOS Constitution Class)
Print orientation for Detail Plastic:
The USS Bonaventure NCC-1000 appeared in the "Ships of the Line" calendar and book, where it is described as "a radical step up from the NX Class". So, this can be seen as an intermediate step between the NX Class and the later Constitution Class.
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