SDXL Resolutions and Aspect Ratios

Dee Miller October 30, 2023

Compared to previous models, Stable Diffusion XL offers significantly improved image generation capabilities regarding image and composition details. Mostly because of this:

Stable Diffusion XL was trained at a base resolution of 1024 x 1024. Meaning that the total amount of pixels of a generated image did not exceed 10242 or 1 megapixel, basically.

The model was then finetuned on multiple aspect ratios, where the total number of pixels is equal to or lower than 1,048,576 pixels.

Below you can see a full list of aspect ratios and resolutions represented in the training dataset:

Stable Diffusion XL Resolutions

For the best results, it is recommended to generate images with Stable Diffusion XL using the following image resolutions and ratios:

1024 x 1024 (1:1 Square)
1152 x 896 (9:7)
896 x 1152 (7:9)
1216 x 832 (19:13)
832 x 1216 (13:19)
1344 x 768 (7:4 Horizontal)
768 x 1344 (4:7 Vertical)
1536 x 640 (12:5 Horizontal)
640 x 1536 (5:12 Vertical, the closest to the iPhone resolution)

You can also try other variations, but remember this one thing:

It is important for optimal performance that the resolution is set to 1024×1024 or other resolutions with the same amount of pixels but a different aspect ratio.

Author

Dee Miller
Dee Miller is the founder and the writer at Go Find AI. Dee has been into AI since about 2018 when he first realized how revolutionary the AI tech is. Today when AI is all the hype, Dee is looking to make navigating the AI space easier for the newcomers.
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