When using a transformer is it the number of turns that determines the coupling or the inductance? For instance, if you had two of the exact same Coils and one was inducing current to another coil that had twice the terms but the same inductance. And the other was inducing current to a coil that had twice the inductance but the same number of terms which would double the voltage? Thank you.

How do you calculate the correct coupling Between the primary and secondary coils for a solid state tesla coil?

I'm trying to build a mini Tesla coil, but I have run into a problem in the design phase. Throughout anywhere I looked I haven't been able to find the proper size for the secondary resonant circuit. I understand that it needs to have the same resonant frequency as the primary resonant circuit but that only has bearing on the ratio between the capacitor and inductor. The only lead so to speak that I have is that the secondary in primary coils work as a transformer but again nothing I've found says to what degree. I have to imagine that there is a point where the secondary coil is too big to work with the rest of the circuit, but I have not been able to figure out what that size is. This seems like a relatively basic question but for the life of me I have not been able to figure it out. So is anyone else knows what I'm missing here that would be greatly appreciated, as this is the last thing I need to finish my design. Thank you.