I have never owned an iPhone, so I'm not sure. The cases are all the same size as the iPhone 5, but I am not sure what the backs of the phones look like- so I couldn't say for certain....I will repost after researching.
iPhone 5, 5C, and possibly 5C. It MAY FIT other iPhones but I can't be sure as the case doesn't indicate what phones it can be used with (and the internet isn't completely clear and not very helpful).