How big of a difference should the woofer size be between nearfields and sub?

Can I pair up two 10" woofer sized monitors with a 12" woofer sized sub?



Or 8" woofer sized monitors would be better for a 12" woofer sized sub?



Looking to purchase the Dynaudio BM12a's with the 12" sub from Dynaudio. I believe the sub is BM14s which is a 12" sub.



I never really heard people talk about the woofer size difference between your nearfields and sub which why I'm asking. Cant find anything about this topic on the net so any help would be appreciated.

How big of a difference should the woofer size be between nearfields and sub?