Normally, I am not a huge fan of making bags because usually what happens is that I like a bag on a picture and when I finish it, I never use it or it doesn't come out quite the way I expected it to. However, I can highly recommend this free pattern... it is very, very simple and the result is just how it should be. Check this out:
You can find the free pattern here.
I used silver fake leather which you can even sew with normal needles.