That's a good question. I cant say with certainty as I dont have mine out to access them easily. From the top of my head, the admiral ackbar and nien nunb where close to the same size; the fett, bossk, and vader(clipper) were close to the same size; and the emporer and Anakin were close in size. Whether they are exactly the same as the next i cant say with any certainty. I think there were more individual figures offered than this but these were the most common and ones I have if I remember right.
I have caviar dreams and McDonald's pockets