The dimensions for the P-64, Mak., Bersa, PPK, and Sig 232 are on a sheet of paper.
Until some of us First try on an IWB holster, even though we won't make the decision whether to carry for a while, we won't be able to estimate whether wearing IWB could be comfortable. I wear no jackets in this Memphis climate April-early Nov.
Anyway, both the Sig 232 and Bersa length is 6.6", and the Maks are 6.34".
As the PPK is the shortest and most narrow (though the Mak/P-64 have similar length/width), it wins by a little bit.
I suppose that any of these could easily work IWB....IF you can find it comfy at 5'11" and about 185 lbs.? Wearing shirts almost always tucked in- in this climate-this might be the single factor as to whether to carry or not (?).
A friend with a similar build keeps his shirt tails our or wears a jacket, just in order to always have his P-64 accessible in the IWB.