I have trained Army MPs (females) who’s hands were so small they could barely get their fingers around the grip of a standard 1911. As range safety officer I had to order one female to use the .38 to qualify because she could not maintain control. At first we thought she just did not want to qualify. When we had her demonstrate her grip (thinking that we could correct the problem) her finger tips were on the front of the grip, under the trigger guard.
Granted she looked like 4 foot 11 inches to me (barely met the requirements) and only the Lord knows why she chose to be an MP ... but that was the case. One of those ... perhaps you should consider changing MOS moments.
If the M1911A1 or M9 is too much for small hands, then a .38 revolver ought to do. I do have serious problems with the wimpy M41 FMJ Ball rounds that are issued for the .38 though. Stoppers they are not.