What is the correct loftiness for a wall picture? Need to know how high from the floor to the center of...

Need to know how high from the floor to the center of a wall picture should be?
I hold four phone wires coming out of...
Answers:    About eye plane, or slightly below for most pictures. Looking upwards is not too comfortable for most people.
Tile issues?
There is no correct largeness. It's whatever looks best to you. It's your wall after adjectives.