How to Change Aspect Ratio in Midjourney?

In the world of image generation, Midjourney stands out as a powerful tool for crafting stunning visuals. Whether you’re a seasoned designer or just getting started, understanding how to manipulate aspect ratios in Midjourney is crucial. In this guide, we’ll delve into the intricacies of changing aspect ratios in Midjourney, providing a step-by-step tutorial, popular aspect ratios, and answers to frequently asked questions. Let’s embark on this journey to unlock the full potential of your creative projects.

Understanding Aspect Ratios

Understanding Aspect Ratios

Before we dive into the specifics of altering aspect ratios in Midjourney, let’s grasp the concept itself. An aspect ratio is the proportional relationship between the width and height of an image. For instance, the widely used 16:9 aspect ratio indicates that the width of the image is 16 units, and the height is 9 units. Midjourney’s default aspect ratio is 1:1, resulting in square-shaped images. However, when crafting visuals for various purposes such as social media, posters, or video thumbnails, you may require a different aspect ratio.

Changing Aspect Ratio in Midjourney

In Midjourney Version 5

In Midjourney version 5, changing the aspect ratio is straightforward. You can use the following parameter to set your desired aspect ratio: –aspect <value>:<value> or –ar <value>:<value>. The value you specify can be any ratio, but it’s important to note that aspect ratios greater than 2:1 are considered experimental and might produce unpredictable results.

Feel free to experiment with different aspect ratios to find the one that best suits your project. Keep in mind that Midjourney only accepts whole numbers for aspect ratios. For instance, you can use –ar 16:9 but not –ar 1.85:1.

Older Versions of Midjourney

If you’re using an older version of Midjourney, the available aspect ratios may be more limited. Here’s a quick reference for some of the older versions:

  • Version 4c: 1:2 to 2:1
  • Version 4a or 4b: Only 1:1, 2:3, or 3:2
  • Version 3: 5:2 to 2:5
  • Test / Testp: 3:2 to 2:3
  • Niji: 1:2 to 2:1

Popular Aspect Ratios

To make your creative process even easier, we’ve compiled a list of some of the most popular aspect ratios. You can easily copy and paste these into your Midjourney prompt to achieve your desired dimensions:

  • 16:9 – Ideal for high-definition video and television.
  • 4:5 – Commonly used for vertical social media posts.
  • 1:1 – Creates square-shaped images, perfect for platforms like Instagram.
  • 2:3 – Great for portrait-oriented images.
  • 3:2 – Useful for landscape-oriented images.
  • 9:16 – Perfect for vertical videos and smartphone content.

Tips for Achieving Optimal Results

Tips for Achieving Optimal Results

Changing the aspect ratio in Midjourney can greatly enhance the visual impact of your projects. Here are some additional tips to ensure optimal results:

  • Consider your project’s requirements: Before choosing an aspect ratio, think about the platform or medium where your image will be displayed.
  • Experiment with different ratios: Don’t hesitate to try out various aspect ratios to see which one works best for your design.
  • Keep proportions in mind: Ensure that your image’s proportions remain balanced, as extreme aspect ratios may lead to unexpected distortions.
  • Quality matters: Pay attention to image resolution and quality, as a change in aspect ratio can affect the overall clarity and appearance of your visuals.
  • Stay within the supported range: For older Midjourney versions, make sure to use aspect ratios that are within the supported range to avoid unexpected outcomes.

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Frequently Asked Questions:

Let’s address some common questions related to changing aspect ratios in Midjourney:

Can I use decimal values for aspect ratios in Midjourney? 

No, Midjourney only accepts whole numbers for aspect ratios. Decimal values are not supported.

What do I do if I’m using an older version of Midjourney with limited aspect ratios? 

In older versions, you should choose from the supported aspect ratios provided for that version.

How do I maintain image quality when changing the aspect ratio? 

To preserve image quality, ensure that your source image has a sufficient resolution. Additionally, avoid extreme aspect ratios that may lead to significant distortions.


Changing aspect ratios in Midjourney is a valuable skill for anyone working with image generation. Whether you’re creating content for social media, posters, or videos, understanding how to adapt aspect ratios to suit your needs is essential. By following the steps outlined in this guide and experimenting with different ratios, you can unlock your creative potential and achieve remarkable results in your projects. So, go ahead, explore Midjourney, and craft visuals that captivate your audience.