Max Size of an image printed on PDF A4, Chrome v81.0, Margins: Default, Scale: Default (or Custom, 100%), No Headers&Footers

Portrait: 1058 x 1559 px

Landscape: 1556 x 1062 px

Testing 5 images 200px + 10 right-padding; without a container or a large image that "opens" the sheet, images are scaled and max size of sheet is about 640px