I've always enjoyed shooting the little "Minx", and its centerfire twin (the .25 ACP "Jetfire"). These tiny Berettas are the smallest pistols that I consider to be completely safe, as they have external hammers and inertia firing pins.
Fully loaded, and with a leather holster, either weighs less than 13 ounces. If you don't want to bother with a holster, they can just be dropped into a pocket.
With either gun, you will need daylight and plenty of time to use the tiny sights. They are suprisingly accurate if you do, but are really designed for "point shooting".
Here's my results at 10 FEET (that's right, feet - not yards) with the Jetfire in a dimly lit indoor range, simply pointing it, and firing all 9 shots as rapidly as I could trigger them off. I made 3 runs at the target:
4 shots out of every 5 punched into the the 7" wide by 10" high area of the 8 ring. These little single action Berettas are almost in a class by themselves in terms of size. Hopefully, those who choose them will do so with full knowledge of their limitations.