An image that is at least 1024px tall and that has aspect ratio of less than 1:4 (that is, at least four times taller than it is wide). This is equivalent to the tag search height:>=1024 ratio:<=1:4.
Note: This tag is automatically added to all posts that meet these criteria. It may also be added manually to other posts that don't meet the criteria.
This tag implicates long_image (learn more).