How to print etickets at home?

Got my link to print my tickets at home. However it requires that it be printed at a A4 paper size, an european size. It seams the image of the ticket is already shrunk to 8.5x11, some letters are superimposed. Instructions on the back of ticket says not to shrink. How can I print these to the A4 size without the text bing already overlapped upon opening of the link?

Thanks for your response.
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