The first image is one that daughter Grace designed and the other one is a replacement VHS Video cover I designed (as I had to do with many of our covers as they fell apart, got ripped etc from children’s handling), both fit A4 sheets of paper.
I put the center line at position 21 on the ruler in the Editor, as a guide to show where to cut the image when it is printed out.
Image 3 shows us that both, as shown in the PagePlus X9 editor, fit one A3 sheet of paper.
If you have an A3+ printer as I have you can print both pages out on one A3 sheet of paper at once and then use scissors or a paper guillotine (as I have) and cut it out that way.
I bought a paper guillotine years ago and have found it very useful many times. I recommend you get one if you don’t already have one.
All the best from James M Sandbrook. 1st of November, 2021.