How to tell a MAG 12 or MAG 9

[Aqua Pro Builder]

I had a pump which I cannot remember whether it's a 12 or 9.

I removed the label so is there a way to tell by the pump's size or the connection port size?

Thanks in advance

 

[Deanos]

MarineDepot Mag drive page

Sizes are listed below

 

[Aqua Pro Builder]

Thanks.
I cannot find better info from the mag official site than the Marine Depot. So funny.