Just out of curiosity...

Could be a .41 Colt derringer. Very small, very powerful.

hum could be a 22

I was also thinking a .22 Well, are you talking size of weapon or ammunition that packs a punch?

I’m talking size

I guess we need to know if the question involves a gun capable of stopping an attacker or not. A .22 would be a poor choice to stop many people you are apt to encounter with the intent to harm you. Unless you are very lucky, a .22 round will just make the attacker mad and more aggessive.

22 is the assassin’s round of choice because it can travel great distance very fast and is quiet enough that in most situations doesn’t require a silencer.

Here’s a genuine gun that I think takes the cake:

When I bought mine for personal protection (long story) I got a .38 FIE. I wanted a 22 because of it’s size, but the dealer told me If I actually needed stopping power I should get the .38. Add hollow points to the equation and they will definitely stop!
@Cardinal The dealer told me pretty much the same thing you said about a .22.

I learn so much here!!!

@65Stang do you mind me asking why you asked this question?

I was just curious. I wanted something small, so that when I got a concealed weapons permit, it would be concealed. (or something to that effect) :)

I see

have a look here Swiss Mini Gun
You could conceal one of these in a bikini.

Oh, I see. My .38 fits nicely into my purse.