After checking the page editor, some changes. There is a 9 px wide frame added around the embedded images by default. Area remaining next to the image is 458 px / 518 px and can be filled up by 28 lines of 14 px trebuchet.
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screen mockup 3 free icon was designed by Lazur URH for icons Png and presented to its users.
Lazur URH
1/2/2018