Okay, don't know if this will help or just add to the confusion, but I got some actual measurements today. I currently own a 97 BD, a Taurus PT 92, and a Colt 1991A1, full size government model. So here goes.
Grip circumference, min/max:
97, 5.5-5.75
92, basically the same
1911, 5.25-5.625
Grip depth, front to back:
97, 2&3/16
92, 2-2&1/8
1911, 1&15/16-2&1/4 (mine has an arched MSH, so is much fatter at the bottom)
Grip thickness:
97, 1&1/4+
92, 1&7/16
1911, 1&1/4
Like I said, I don't know if this is any help to anyone. Personal observation, even though the grip circumference of the 97 & the 92 are virtually identical, I find the ergonomics, the fit, of the 97 better in my hands. Of the three, the 1911 feels the smallest, and again, I prefer the 97's ergonomics. BTW, I wear large size gloves, but the fingers are usually a bit long. Mediums usually fit my fingers better, but then I end up ripping out the thumb seam in short order. Everything's a compromise
. Bottom line, I'd say if you're comfortable with a Beretta 92, the 97 will be fine, if you prefer the 1911, the 97 will probably feel a little large. Oh, and it's at least a couple ounces heavier than my all steel 1911, empty, fully loaded, it's definitely a chunk. Later.
Dave