If 5" and higher is too big for a smartphone in you opinion then you might want to give the upcoming Meizu Pro 5 Mini a look.

Rumors suggest the device will come with a 4.7" AMOLED display, Helio X20 SoC, 20.7MP rear camera and a fingerprint sensor. The device is expected to be released in April and should cost the equivalent of $315(for the 32GB model) and $395(for the 64GB model)