Instagram Feed Image Specifications
Complete guide to Instagram feed post dimensions and image specifications. Optimize your feed posts with the perfect size and aspect ratio for maximum engagement. Updated for 2026.
Quick Specs
Dimensions & Resolution
Tallest ratio accepted in the app, in feed ads and by scheduling tools that post through the Instagram API
Tallest ratio Instagram keeps uncropped when you post from the app. Feed ads and API-scheduled posts top out at 4:5
Supported but less optimal than 4:5
Horizontal format, limited visibility in feed
Important Notes
Instagram feed supports aspect ratios from 1.91:1 to 3:4. Instagram keeps feed photos at full resolution between 1.91:1 and 3:4 (1080×566 to 1080×1440). 3:4 (1080×1440) is the tallest option when you post from the app, but feed ads and scheduling tools that publish through the Instagram API accept up to 4:5, so 4:5 (1080×1350) is the safe default. Profile grids display up to 3:4 ratio, making vertical content more prominent. Square (1:1) and landscape (1.91:1) are supported but show less content area.
Optimization Tips
- ✓Use 4:5 ratio (1080×1350px) for all new posts - best for 3:4 grid
- ✓Avoid creating new 1:1 square posts - less optimal with grid update
- ✓Leave extra space around borders to prevent grid cropping
- ✓Carousel posts: Lock all slides to the first image's aspect ratio
- ✓Compress images to under 1MB for faster loading
- ✓Use JPEG for photos, PNG for graphics with transparency
- ✓Consider backward compatibility - some users may still see square grid
Sources & Verification
Last verified: 2026-09-25
Instagram supports 1.91:1 to 3:4 aspect ratios. Grid displays 3:4 previews.
Compression
Captions
Caption Recommendations
Keep captions concise for better engagement
Grid View
Taller grid format shows center 1012×1350px of 4:5 posts
Carousel Updates
Up to 20 items per carousel
Alt Text
Alternative text for accessibility
Stop cropping for the 3:4 grid by hand
Frequently Asked Questions
What's the best aspect ratio for Instagram feed posts?
4:5 (1080×1350px) is the safe default: it is the tallest ratio that works in the app, in feed ads and in scheduling tools that post through the Instagram API. If you post from the Instagram app, 3:4 (1080×1440px) is also supported and shows slightly taller. Square 1:1 still works but takes less feed space.
What's the maximum resolution for Instagram photos?
Instagram supports images up to 1080 pixels wide. Higher resolution images will be compressed to 1080px width while maintaining the aspect ratio.
Should I use JPEG or PNG for Instagram posts?
Use JPEG for photographs as it provides better compression. Use PNG only when you need transparency or for graphics with text where quality is crucial.
Can I post panoramic images on Instagram?
Yes, you can use the 1.91:1 landscape ratio (1080×566px) for panoramic shots, though they'll appear smaller in the feed compared to square or portrait posts. Anything wider than 1.91:1 is cropped to fit.
Recent Updates
Re-checked against the Instagram Help Center: the app keeps photos uncropped up to 3:4 (1080×1440), so 3:4 is listed and 4:5 stays the default for ads and API scheduling; the 1.91:1 size is 1080×566; posts take up to 5 hashtags.
Migrated to evergreen URL structure. Verified all specifications current.
Adam Mosseri announced grid preview change from 1:1 square to 3:4 tall rectangles. 4:5 posts recommended
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