isn`t the preview image 590 x 300 pixels?

my invite quality team reviewer said: my preview image needs to be 590 x 300 pixels.image

but my preview image is 590 x 300 pixels. why?

description area images width i set is 616px and height is auto.

Hi, I think that your image preview 590x300px but save as format .jpg for approved themeforest. regards.