I just wanted to create a banner image for my social media account with Midjourney. But banner images are usually wide — while Midjourney returns a square image.
π‘ Problem Formulation: How to make a wide banner image with Midjourney, i.e., how to change the aspect ratio?
Here’s an example of the standard output for a given prompt:
banner of homer simpson drinking coffee on the beach --v 6.0

You can see that these are not usable as banner images.
To change the formatting to a wider aspect ratio, you can use the --ar X:Y
argument where X
and Y
are width and height numbers, respectively. For example, --ar 4:1
is a good banner aspect ratio where the image has four times more width than height.
Here’s an example of the banner image prompt with the aspect ratio (--ar
) argument:
banner of homer simpson drinking coffee on the beach --ar 4:1

Congrats, you’ve created a wide banner image with aspect ratio 4:1. Of course, feel free to make it wider if you need to!
Also check out my following article:
π How to Use Midjourney to Create an Avatar by Uploading Your Selfie