Ok, lets put it this way; how big approx. (in cm/inch - body only/excluding fins) are they (male and female)............ 8 months females and they're 4x smaller, I'm guessing you included the tail of your male.
When calculating breeding size..... or for what ever purpose, do not include the fins. Bodies of all tail types may be similar. But if you include fins. long finned types will measure longer.
Only the anal fins are useful during breeding. IMO - it catches falling eggs thus giving bigger chances of being fertilized. Further, tails are not used for embracing - so if you cut them off, it will not affect breeding.