{
 "slug": "ratio-9-16",
 "name": "9:16 vertical",
 "category": "ratio",
 "group": "Social",
 "media": [
  "image",
  "video"
 ],
 "checked": "2026-10-13",
 "effect": "Full-screen vertical: TikTok, Reels, Shorts, Stories.",
 "use_when": "All vertical social video and story ads.",
 "phrase": "9:16 vertical frame, the subject centred with room above and below for captions",
 "pitfalls": [
  {
   "text": "9:16 is the tallest ratio Nano Banana makes; for anything taller, generate the nearest ratio and crop.",
   "evidence": "measured",
   "source": "Director Chair field notes on image prompting"
  }
 ],
 "per_model": [
  {
   "model": "nano-banana-pro",
   "phrase": "Frame the image as a vertical 9:16 poster, optimizing the composition for a mobile phone screen.",
   "evidence": "unverified",
   "checked": "2025-12-08"
  }
 ],
 "external_refs": [],
 "licensed": [],
 "site_names": [],
 "related": [
  "ratio-4-5",
  "ratio-16-9"
 ],
 "rights": "own-work",
 "evidence": "film-craft",
 "source": {
  "url": null,
  "note": "The first Director Chair spec, own words"
 },
 "body": "",
 "shown_with": null,
 "url": "https://directorchair.ai/ratio/ratio-9-16",
 "markdown": "https://directorchair.ai/ratio/ratio-9-16.md",
 "prompts": {
  "nano-banana-pro": "[your subject] in [your setting]. Frame the image as a vertical 9:16 poster, optimizing the composition for a mobile phone screen.",
  "nano-banana-2": "[your subject] in [your setting]. Frame the image as a vertical 9:16 poster, optimizing the composition for a mobile phone screen.",
  "gpt-image": "A photograph of [your subject] in [your setting].\nPeople and framing: 9:16 vertical frame, the subject centred with room above and below for captions\nExclusions: no extra text, no watermark, no logo.",
  "seedream-5": "[your subject] in [your setting]. 9:16 vertical frame, the subject centred with room above and below for captions.",
  "seedance-2.5": "Scene: [your subject] in [your setting].\nFirst frame: 9:16 vertical frame, the subject centred with room above and below for captions\nShot 1 (0:00 to 0:05): one continuous shot",
  "seedance-2.0": "Scene: [your subject] in [your setting].\nFirst frame: 9:16 vertical frame, the subject centred with room above and below for captions\nShot 1: one continuous shot",
  "kling-3": "[your subject]. The scene is [your setting]. 9:16 vertical frame, the subject centred with room above and below for captions.",
  "veo-3.1": "9:16 vertical frame, the subject centred with room above and below for captions. [your subject] in [your setting]. Framing and subject stay as in the start image."
 },
 "licence": {
  "code": "MIT",
  "text": "CC BY 4.0",
  "third_party": "Clips and card texts inside a \"licensed\" block belong to their makers and are shown with permission and credit."
 }
}