Idea Summary
It would be great to define an image size when exporting images via APEX_DATA_EXPORT and could be based on some predefined options lke S (50x50) M (100x100), etc. of even custom where you can pass the image dimensions.

Use Case
This is to have a more readable size where more information can be fit per page, and you don't see those super stretched row heights. See sample below where I manually reduced the size of the image and reduced the height of the first row, while you can see the rest of the rows with the images with full height and width.

Preferred Solution (Optional)
Unsure. However, since these images are exported based don the p_format_mask parameter of the add_column procedure in APEX_DATA_EXPORT and maybe the dimensions could be part of the p_format_mask as well, so you could pass something like IMAGE:TABLE_VIEW:IMAGE_COLUMN:TABLE_VIEW_ID_COLUMN:DIMENSIONS-50x50.