I'm just curious if there is anything in the same size class that could actually be considered an upgrade from an iPhone 5/5s. The trend overall is toward bigger phones, and while I think there are some small Android phones they aren't generally "flagship" phones.
The Sony Z1 Compact was the best I could find. It's a bit bigger than the 5/5S, but the size is still ok. I haven't seen much else in the way of actually small phones, most of the android compact versions are still 4.5" or more.