This is where a lot of the controversy comes from. People take that to mean there are either a dozen or a dozen plus the Enterprise.Kirk wrote:'There are only a dozen like her in the fleet.'
Now personally I dont think it matter. One way or another the numbers seem rather low.
So my questions are:
How may do you think there are according to canon?
How many do you think they would have dispite canon. Meaning how many do you think they would reasonably need to maintain the Federation?
How many do you think they could field. Maning how many do you think they could field before bankrupting themselves. Probably the most speculative question.
Bellow is the article written by Graham about his theory on the numbers of ships.
Linky