Prompt Writing Guide
AI Image Aspect Ratio Guide - Best Size for Instagram & Print
Using wrong aspect ratio crops your AI photo or makes it blurry. Learn exact aspect ratios for Instagram post, story, DP, YouTube, print and how to prompt for correct size.
Why wrong aspect ratio causes problems?
Wrong ratio = awkward cropping, blurry upload, rejected print. Low-res for large print = pixelated.
Common causes
- Not specifying ratio
- Low-res for large print
- Mismatched ratio vs platform crop
- Subject too close to edge
- Confusing resolution with aspect ratio
- Ignoring platform recommendations
Practical solutions
Specify ratio explicitly
State exact ratio: square 1:1 for DP, vertical 4:5 for feed post, 9:16 for story.
Match resolution to use
Higher resolution for printing, moderate for web/social.
Keep subject centered with margin
Leave space around main subject so cropping doesn't cut details.
Prompt example
Aspect ratio prompt
Generate image in vertical 4:5 aspect ratio for social feed post, high resolution sharp for mobile, subject centered with comfortable margin to avoid cropping.Step-by-step fix
- 1Identify platform/purpose
- 2Look up recommended ratio + resolution
- 3State exact ratio + resolution in prompt
- 4Keep important details away from edge
- 5Preview at target platform crop
Tips for better results
- 1:1 for profile, 4:5 for feed, 9:16 for stories
- For printing request highest resolution
- Leave margin around subject
- Recheck guidelines periodically
AI tools you can use
ChatGPTGeminiNano BananaMidjourney
Keep learning
Related AI photo guides
FAQ
Frequently asked questions
What ratio for profile photo?
Square 1:1 safest for profile photos across platforms.
Why AI image cropped strangely?
Generated ratio doesn't match platform crop. Generate in exact platform ratio.