What is Instagram Story Dimensions?
1080 pixels Wide x 1920 pixels tall
1080 width x 1920 height has the Aspect Ratio: 9:16
High-Definition Video is typically 1920 wide x 1080 tall (16:9 aspect ratio)
Aspect ratio but all we need to know it is that the height and width always stay the same proportions.
For example 1280x720 (also known as 720p or Standard HD, is also 16:9).
Note: Instagram Stories will allow you to upload other sizes or even square to your stories, but they will be cropped in and parts of your photo or video will get cutoff.
If you design artwork in Photoshop or making a video in Premiere Pro or After Effects, size the artwork for
1080 pixels Wide and 1920 Tall.