AFtsanflpp,
Here's your answer: Stretch your shooting hand fingers as far apart as possible. Using a ruler/tape/etc., measure the extreme distance from the tip of your thumb, to the tip of your little finger. For instance mine measures 9.25 inches.
The minimum "comfortable" distance in gripping the 97 seems to be around 8.75". If you measure under 8.75", look at a Witness 45.