https://www.productchart.com/smartphones/small_android_phone...
You can move the "RAM" slider to 3GB which will show the phones that have 3GB or more. And the screen slider to your desired size. A height of 140mm means the phone would have a display size of roughly 5 or 6 inches.
For the USA, it gives me 90 phones with 3GB and up to 6 inches.