> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter.ai/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# ImageGenerationRequestAspectRatio

Normalized aspect ratio of the generated image. Providers clamp to their supported subset.

## Example Usage

```python theme={null}
from openrouter.components import ImageGenerationRequestAspectRatio

# Open enum: unrecognized values are captured as UnrecognizedStr
value: ImageGenerationRequestAspectRatio = "1:1"
```

## Values

This is an open enum. Unrecognized values will not fail type checks.

* `"1:1"`
* `"1:2"`
* `"1:4"`
* `"1:8"`
* `"2:1"`
* `"2:3"`
* `"3:2"`
* `"3:4"`
* `"4:1"`
* `"4:3"`
* `"4:5"`
* `"5:4"`
* `"8:1"`
* `"9:16"`
* `"16:9"`
* `"9:19.5"`
* `"19.5:9"`
* `"9:20"`
* `"20:9"`
* `"9:21"`
* `"21:9"`
* `"auto"`