What Is the Instagram Portrait Format?
The 4:5 portrait format at 1080×1350 pixels is Instagram's tallest allowed post format for feed images. Because it takes up 25% more vertical screen space than a square (1:1) post, portrait photos naturally draw more attention as users scroll. Studies consistently show portrait posts generate higher engagement rates than square posts for the same content.
Portrait vs. Square — Which Should You Use?
| Feature | Portrait (4:5) | Square (1:1) |
|---|---|---|
| Dimensions | 1080 × 1350 px | 1080 × 1080 px |
| Feed Real Estate | More vertical space (25% taller) | Standard |
| Grid Thumbnail | Cropped to square 1:1 | Square |
| Best For | Portrait photos, product shots, text posts | Logos, landscapes, groups |
Instagram Portrait Size Specifications
| Property | Specification |
|---|---|
| Recommended Size | 1080 × 1350 px |
| Aspect Ratio | 4:5 |
| Minimum Size | 320 × 400 px |
| Recommended Format | JPEG (sRGB) |
| Max File Size | 8 MB |
Frequently Asked Questions
Instagram portrait posts should be 1080×1350 pixels at a 4:5 aspect ratio. This is the tallest format Instagram allows for regular feed posts and delivers the maximum screen real estate per post.
Yes. On your Instagram profile grid, all posts — square, portrait, and landscape — display as cropped squares. Only in the full-screen feed view does the portrait image show its full 4:5 height. Plan your composition so the key subject is centered vertically.
No. All resizing happens in your browser using the HTML5 Canvas API. Your photo is never uploaded, stored, or transmitted anywhere.
Select Fit mode and choose a background fill (color, gradient, or blur). The full landscape image will be letterboxed inside the portrait frame. Alternatively, use Fill mode to crop the landscape image to a portrait — drag to choose which part to keep.