1:1 Aspect Ratio
1:1 is a perfect square — the width and height are identical. Instagram popularised the square format for social media photography, and it remains a staple for profile pictures, album covers, and feed posts across every major platform.
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Full calculator →Common 1:1 Dimensions
| Name | Width | Height | Common Use |
|---|---|---|---|
| Small | 400 | 400 | Profile thumbnails, app icons |
| Standard | 1,080 | 1,080 | Instagram feed post (recommended) |
| High Res | 2,048 | 2,048 | Print, professional photography |
| 4K Square | 4,096 | 4,096 | Ultra high-resolution print, archival |
Where is 1:1 Used?
- →Instagram feed posts (original format)
- →Profile pictures on all platforms
- →Album artwork and music covers
- →App icons and favicons
- →Product photography for e-commerce
- →Facebook and LinkedIn post images
CSS for 1:1
The CSS padding-bottom trick creates a responsive container that maintains a 1:1 aspect ratio:
Modern (CSS aspect-ratio)
aspect-ratio: 1 / 1;Legacy (padding-bottom hack)
padding-bottom: 100.0000%;Frequently Asked Questions
What is the best 1:1 resolution for Instagram?+
Instagram recommends 1080×1080 pixels for square feed posts. The minimum is 320×320, but 1080×1080 is the standard for sharp display on all devices.
Is a 1:1 ratio the same as a square?+
Yes, exactly. A 1:1 aspect ratio means the width equals the height, producing a perfect square regardless of the actual pixel count.
Why does Instagram use 1:1?+
Instagram was originally designed around mobile photography and chose the 1:1 square format to standardise the feed grid. While they later added portrait (4:5) and landscape (1.91:1) formats, the 1:1 square remains the classic Instagram format.
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