Is the iPhone 5 & 5s the same?

I want to bye a iPhone 5 case but they don't have any great ones but I found a iPhone 5s case that is really nice I was wondering if I can get the iPhone 5s case but I don't no if it will fit on the iPhone 5 and I can't return it are they the same phones or are they different?

They are the exact same size.

They are exactly the same - should definitely fit.

Iphone 5 and 5s are different biggest difference is the finger print home sensor and few more minor upgrades