I loved the size of my Moto X 1st gen.  It was the perfect size.  I eventually got a Moto X 2nd gen and got comfortable using with its larger size.  Most recently I got a Pixel phone which was the smaller version at 5" screen.  When comparing the phones between the three phones, the Pixel is about the same width as the Moto X 1st gen maybe just slightly larger.  The height was closer to the Moto X 2nd gen for the Pixel phone.  So you might want to consider looking at the smaller Pixel phone for your replacement device.