[flames068]

I have never bought a condom before or anything like that, so I am clueless.

I'll probably buy a trojan because it is a name brand. But I know they have different sizes like "magnum". My question is what size do I get. I am pretty sure I am a little longer than average and a little thinner than average.
And if it helps, I once tried on a condom that I was given. It didn't specify what size it was, so I assumed it was normal size. It fit pretty tight, but I noticed that when I was masturbating it would move around a tiny bit. Also, is the end of the condom supposed to touch your stomach, or is it OK to have a little bit of the shaft exposed?

I also have an unrelated question. When should one pursue the morning after pill? Every morning after, or only if the condom breaks? What are some signs that something went wrong?