7.65mm is .32 caliber. I own one of these guns and love it.
A small caliber hand gun
Yes. Not the best choice, but yes.
a .32 acp caliber pistol round is also called a 7.65mm in the metric designation. But that doesn't fit the real-world measurements, because a .32 pistol bullet is really more like .30 or .31 caliber, and 7.8mm in metric measurements. The diameters of a 7.63 bullet and a .32 caliber bullet are similar, but that doesn't mean they're the same "caliber" or that they will fit the same guns. The 7.62 mm family of rifles are often called ".30 caliber" and they really are close to that, with the bullets either .308 or .311 diameter.
32-20. Does not interchange with other .32s. Good cartridge, good revolver.
32 caliber... "32 W.S." is the designation for the 32 caliber Winchester Special cartridge.
.32 caliber
A Browming M1910 .32 caliber automatic pistol
0-100 USD or so
.32 caliber
.32 caliber. In a semi auto handgun, probably .32 ACP
9mm is roughly .35 caliber, .32 caliber is slightly smaller, 3 hundredths of an inch smaller, in diameter.