How much IPhone storage do I NEED?

I'm getting the iphone 5 and I'm not sure if I should get a 16 or 32 gb version. I will have around 500 pictures, 200 songs and 50 apps at the very MOST.
( I don't like to take video on my phones)

16 is fine for that, you can always offload pictures and videos to the computer. Most say they don't take much video but once you see how good the video is on iphone 5 you will do more then you think.

That depends on too many variables. Not all pics are the same size, same for apps & songs.

Get the 32GB. Better to have too much space than too little.