How to see how big apps are?

Is there somewhere hidden in my iphone where I can see how large apps kb/mb/gigs are via the iPhone itself?

It seems like apple really don't want you to know? I know you can do it through iTunes on the desktop PC etc… Or check iTunes and search the app… But there has to be a quicker way that displays all somewhere?

I tried looking on iTunes for "app manager" and found 1 app that looked perfect, but when trying to d/l it, it told me the app was no longer available!

Before you download it, it should say. If not you go to settings-->general-->usage

If you're lookingFor how much memory it takes up I think that you can do it through settings. Try going to settings, general, usage.

Go to settings, then to general, and then onto usage! It shows you on there

Not really.
On Android, however…

Easy, just check it in setting. Tadpole clearly has no idea what he's even posting about.