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Aspect Ratio

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Midjourney images start as squares, but you can change this using the aspect ratio parameter: --ar or --aspect

Examples of images in different aspect ratios overlaid on a grid For more information about V8.2, see our Version article.

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What is Aspect Ratio?

Aspect ratio is a way to describe how wide and tall an image is. It’s shown as two numbers, like 1:1 or 4:3, that tell you how the width compares to the height. For example, a 4:3 aspect ratio means the width is 4 parts, and the height is 3 parts. By default Midjourney images are square, meaning the width and height are the same, so the aspect ratio is 1:1. Choosing an aspect ratio helps you decide if your image will be wide (landscape) or tall (portrait). Use a bigger first number for a wide image and a bigger second number for a tall image. Important: Aspect ratio isn’t the same as image dimensions. The final size of your Midjourney images will also depend on the version and upscaler you’re using.

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Setting the Aspect Ratio

Add --ar #:# to the end of your prompt in the Imagine bar. Using --ar on midjourney.com You can choose a default aspect ratio for all your images in the settings panel. To do this, click the settings settings-icon-new.svg button in the Imagine bar. Once you set it, this will apply to all your future prompts. Add --ar #:# to the end of your prompt in Discord. Using --ar in Discord 1:1 – Perfect square, popular for social media profile pictures and posts. 4:3 – Slightly rectangular, used in older TV screens and computer monitors. 2:3 – Common in printed photography and picture frame sizes. 16:9 – Widescreen, the standard for HD videos and most modern TVs. 9:16 – Vertical orientation, common for mobile content on social media. To find the aspect ratio of an image, use its dimensions. For example, if your image is 1920x1080 pixels, enter --ar 1920:1080, and Midjourney will simplify it to --ar 16:9. For something like 8.5x11 inches, remove the decimals (Midjourney doesn’t accept them) and enter --ar 85:110. This makes it easy to match your image’s proportions. You can change a generated image’s aspect ratio using the pan and zoom out tools on both the web and Discord, or by using the Editor on midjourney.com • The default aspect ratio is 1:1. • --ar cannot contain decimals. Use 139:100 instead of 1.39:1. • Some aspect ratios may be slightly changed when upscaling. • Older Midjourney versions may not support all aspect ratios. • Extremely wide and tall aspect ratios are experimental and may produce unpredictable results.

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In this article

  1. What is Aspect Ratio?
  2. Setting the Aspect Ratio
  3. Find the Aspect Ratio
  4. Change the Aspect Ratio
  5. More Information

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