Midjourney parameters
The switches you add after your prompt: what each one does, the range it accepts and its default. Then an interactive look at the one you’ll use most, aspect ratio.
| Parameter | Name | Range | Default | What it does |
|---|---|---|---|---|
--ar W:H | Aspect ratio | Any whole-number ratio, e.g. 16:9, 2:3 | 1:1 | Shape of the image. |
--s / --stylize | Stylize | 0–1000 | 100 | How strongly Midjourney’s own aesthetic is applied. Low = literal, high = artistic. |
--c / --chaos | Chaos | 0–100 | 0 | How different the four grid images are from each other. |
--w / --weird | Weird | 0–3000 | 0 | Offbeat, unconventional aesthetics. |
--no | No | Comma-separated words | — | Negative prompt: steers away from listed things. |
--seed | Seed | 0–4294967295 | Random | Starting noise; the same seed and prompt give similar results. |
--style raw | Raw style | On/off | Off | Less automatic beautification; follows the prompt more literally. |
--tile | Tile | On/off | Off | Seamless repeating pattern. |
--q / --quality | Quality | Model-dependent (e.g. 1, 2, 4) | 1 | GPU time spent on the image. Higher can add detail, costs more. |
--iw | Image weight | 0–3 | 1 | How much an image prompt influences the result vs. text. |
--sref | Style reference | Image URL or code | — | Copies the look (colour, texture, mood) of a reference image. |
--oref / --cref | Omni / character reference | Image URL | — | Keeps a person or object consistent (--oref in V7, --cref in V6). |
--v | Version | e.g. 6.1, 7 | Account default | Which Midjourney model to use. |
--niji | Niji | e.g. 6 | — | Anime and illustration model. |
--r / --repeat | Repeat | 1–40 (plan-dependent) | 1 | Runs the same prompt several times. |
Ranges and defaults follow Midjourney’s documentation for V6 and V7; availability can vary by model version and plan.
Midjourney aspect ratio explainer
Aspect ratio doesn’t crop a square image; it changes the canvas the image is generated on, so the composition changes too. Pick a ratio to see the frame and the approximate output size (Midjourney keeps the pixel count near a 1024×1024 square before upscaling).
--ar 16:9
≈ 1368 × 768 px
Good for: YouTube thumbnail, desktop wallpaper, widescreen
Landscape: room for setting and horizon; subjects shrink unless you ask for a close-up.
Parameter tips
- Parameters go at the very end of the prompt; nothing useful should follow them.
- Use
--s 0–50with--style rawwhen you need the image to follow your words closely (product mockups, diagrams). - Use
--c 20–50for the first few runs to explore compositions, then drop it to refine. - Lock a look with
--seedwhile you change one word at a time.
Build prompts with all of these as sliders and toggles in the Midjourney prompt generator.
Questions
What aspect ratio is best for Midjourney?
Match the destination: 1:1 for profile images and product tiles, 4:5 for Instagram feed, 9:16 for Stories, Reels and TikTok, 16:9 for YouTube thumbnails and wallpapers, 2:3 for posters and Pinterest. The ratio also changes composition, so pick it before you judge the result.
How do I change the aspect ratio in Midjourney?
Add --ar followed by width:height at the end of your prompt, e.g. “a misty harbour at dawn --ar 16:9”. Whole numbers only: use 139:100 rather than 1.39:1. In the web app you can also use the image size slider.
What is the default stylize value?
100. Values from 0 to 1000 are accepted. Lower values follow your prompt more literally; higher values let Midjourney’s aesthetic take over.
Can I use --no to remove things?
Yes. --no text, watermark works like a negative prompt. It is more reliable than writing “no text” in the description, because Midjourney doesn’t process negation in plain words.