​EXAMPLES OF MAXIMUM IMAGE SIZES:-
The maximum image size is 1600 pixels wide and 1200 pixles high.
In the examples shown above, A, B and C are less than 1600 pixles - this means the image does not need to be as wide as the maximum (1600 pixles).
Also in the examples, X, Y and Z are less than 1200 pixles - this means the image does not need to be as high as the maximum (1200 pixles).
For example, entering a square or a letter box image may mean the diemensions are smaller than the maximum!