Is the size comparison between the iPhone 5S and the 4S very noticeable?

I'm upgrading from my 4S to the 5S. I like the bigger screen because the 4S seems kinda cramped in size. Is the size difference that noticeable compared to the 4S?

Yes a little but if you want to have a better slimer and wider screen I recommend the samsung galaxy s4 it is bigger slimer and wider but if you don't like the androids then yea it is a little bigger

The size is quite noticeable if you compare them side by side or if you're used to iPhone 4S. Get the iPhone 5S and enjoy.

Yes. The 5s is taller, lighter, thinner than the 4s.