Instagram announces support for the most commonly used photo aspect ratio
Post an image to Instagram and it will almost certainly be automatically cropped. The reason for this is that, until now, the platform has supported 4:5 aspect ratio images, as well as the Instagram staple -- the square format.
But this is not in line with how most people shoot photographs, and the platform is finally taking this into account. There is now support for a new (new to Instagram, at least), aspect ratio.