{
 "slug": "ratio-4-5",
 "name": "4:5 portrait",
 "category": "ratio",
 "group": "Social",
 "media": [
  "image"
 ],
 "checked": "2026-10-13",
 "effect": "Takes the most room in a feed without being full screen.",
 "use_when": "Instagram and LinkedIn feed posts and ads.",
 "phrase": "4:5 portrait frame",
 "pitfalls": [
  {
   "text": "The same prompt in another ratio drifts; give the approved render back as a reference.",
   "evidence": "measured",
   "source": "Director Chair field notes on image prompting"
  }
 ],
 "per_model": [],
 "external_refs": [],
 "licensed": [],
 "site_names": [],
 "related": [
  "ratio-1-1",
  "ratio-9-16"
 ],
 "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-4-5",
 "markdown": "https://directorchair.ai/ratio/ratio-4-5.md",
 "prompts": {
  "nano-banana-pro": "[your subject] in [your setting]. 4:5 portrait frame.",
  "nano-banana-2": "[your subject] in [your setting]. 4:5 portrait frame.",
  "gpt-image": "A photograph of [your subject] in [your setting].\nPeople and framing: 4:5 portrait frame\nExclusions: no extra text, no watermark, no logo.",
  "seedream-5": "[your subject] in [your setting]. 4:5 portrait frame."
 },
 "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."
 }
}