G21 Gen 4 Grip Size?

[Sgt01]

My department is considering replacing a few duty guns with the new G21 Gen 4.
Been searching everywhere for an answer to my question, but can not find a definitive answer anywhere.
Anyway...

Is the grip size of the G21 Gen 4 without the backstraps the same size as the G21 SF Gen 3, or is the Gen 4 smaller?

Thanks!

Sgt01

[JR]

Its supposed to be the same size as the SF. The benefit of the Gen4 is that you can make the grip larger