×
The operator the letter x has understudied since the typewriter.
The multiplication sign is a symmetric cross, centered on the axis of the numbers — the letter x is narrower, changes in italics and was never an operator. Dimensions, resolutions and arithmetic call for the gem: 1920×1080.
It is also the “times” of lenses and magnifications — 10× zoom — and the visual partner of ÷. The entity is ×.
Wrong: a 1920x1080 screen · a 4x6 print
Right: a 1920×1080 screen · a 4×6 print