I don't know if you have an M&P Shield, but it's nearly identical to the height of the Shield grip with the extended mag in it.
It has about the same overall "finger wrap" as the Shield, but with just a slightly different feel to it. Overall, your fingers will wrap around to the same location on the other side of the grip though. As the video mentions, it is very similar to the Shield, but not exactly the same.
My tween kids and wife can hold it comfortably. I love shooting it! Smith and Wesson figured out how to #makefunfunner with this firearm! =)