I agree with Massad

Mas is writing about the size of the handgun, in regard to the shooter. While a lot of trainers approach this subject that one size fits all, give'm all a Glock 19. This does not always work, a few weeks ago I had a lovely lady with MS, and while we tried different guns size and caliber, the only one she could really hold on to was the 22 S&W semi auto.

I recall the very petite lady that came to class with her husband's Glock 21 the only thing touching the back strap was her thumb which was taking the recoil, her trigger finger barely reaching the trigger, and the rest of her fingers were to short to wrap around the front strap, she shot the course with a 22, and then finished up with a Browning HP, which she did pretty well with.

Then there was the guy that did have both thumbs, but only the 3rd and 4th digits on his left hand, lucky he had figured it out before he got to me, it was not something you would see in any pistol video, but he shot quarter size groups very rapidly.

Then I had the student, that when working as a bouncer was shot twice, with a 25 acp, the first round hit him in the center of the chest, the second round hit him in the forehead and ricocheted skyward. he kicked butt on the shooter, finished his shift, went home and extracted the bullet in his chest with a pair of tweezers. He was glad the guy had indeed brought to small of a gun.