It's about two feet long. Like all of them really - why do you ask? Actually here's some questions for
you:
Are you a modelmaker?
What's your experience?
Have you ever built a resin kit?
Will you really be able to build ANY of these kits?
Do you care about accuracy? Or does "easy construction" sound more important?
Why is it urgent that you get a kit? Do you have some deadline to meet?
I'm not trying to be rude, I just get the vibe that perhaps you're a novice and you may be approaching this the wrong way. Frank's kit isn't for beginners, and Mike's isn't really either. If you are a novice, get the Poseidon Young kit. It's more expensive than Mike or Frank's kits, but it is engineered to be easier to put together.
If accuracy is the most important thing, get the Salzo 3.1 or better still, find a Frank pyro kit. As others have said, it basically descends from a real ILM pyro model. You can't get closer than that, for now.
Frank's kit comes in "solid resin fuselage" and "hollow slush-cast two-part fuselage" versions. The hollow version is a little longer than the solid one. To be more exact, the fuselage is 49.15cm long, and wingspan will be about 43cm. Adding the engines will add 5cm or so to total length.
Ok to sort of sum this up V3 is the best followed Franks Pyro
The V3 is designed based on measurements of the same piece Frank's piece is cast from. It has been 'idealised' to correct the warps and asymmetries which exist on the ILM models. So the Frank pyro is best for accuracy, while the V3 is best for symmetry combined with good overall outline accuracy.
then I dont know where the others fall or why people would by them then
The CC is the first studio-scale X-wing kit. Ten years ago people bought it because it was well cast and reasonably priced, there wasn't anything else available anyway and even many of the references we have now weren't available back then. People who buy recasts of it now probably only do so because of ignorance.
The Poseidon Young kit is a strange one, I guess Poseidon just wanted to do an X-wing. His kit pays scant attention to screen accuracy, but it is X-wing sized and X-wing shaped and is a nicely engineered piece of 'new-school' modelling. I do not have one but it looks like it should build up very easily, so I guess that is the selling point.