Instagram Post Size
Instagram Guide
Instagram Post Size & Dimensions Guide
Getting your Instagram post size right is critical for visual quality. Instagram supports square, portrait, and landscape formats — each with different dimensions and aspect ratios. Here are the current specs for 2026.
Last updated: February 2026
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Instagram Dimensions at a Glance
| Format | Width | Height | Aspect Ratio | Preview |
|---|---|---|---|---|
Tall portrait (recommended) New for 2026 — fills the feed AND the profile grid with no crop anywhere | 1080px | 1440px | 3:4 | 1080x1440 |
Portrait post Still solid — no crop in feed, but trimmed top/bottom on the 3:4 profile grid | 1080px | 1350px | 4:5 | 1080x1350 |
Square post Classic Instagram format, side bars on the 3:4 grid | 1080px | 1080px | 1:1 | 1080x1080 |
Landscape post Less common, good for panoramic or wide shots | 1080px | 566px | 1.91:1 | 1080x566 |
Profile picture Displays at 110x110 on mobile | 320px | 320px | 1:1 | 320x320 |
Minimum resolution Below this, Instagram will upscale and reduce quality | 320px | 320px | varies | 320x320 |
Quick Reference
1080x1440
Tall portrait (recommended)
1080 x 1440
3:4
1080x1350
Portrait post
1080 x 1350
4:5
1080x1080
Square post
1080 x 1080
1:1
1080x566
Landscape post
1080 x 566
1.91:1
320x320
Profile picture
320 x 320
1:1
320x320
Minimum resolution
320 x 320
varies
Tips & Best Practices
Use 1080x1440 (tall portrait 3:4) for maximum feed and grid presence — it's the new optimal in 2026, fills both the feed and the 3:4 profile grid with no crop.
1080x1350 (4:5) is still safe — it shows uncropped in the feed but gets trimmed top/bottom (~7%) on the new 3:4 grid.
Always export at 1080px wide minimum. Instagram compresses images below this width.
Keep important elements away from the edges — Instagram may crop slightly on different devices.
For carousel posts, use the same dimensions across all slides for a consistent look.
If you upload taller than 3:4 (e.g., 9:16), Instagram crops to 3:4. Upload at 1080x1440 directly to skip the crop.
Use JPG for photographs and PNG for graphics with text or sharp edges. Keep file sizes under 8 MB for best upload quality.
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Why Image Dimensions Matter on Instagram
When you upload an image that doesn't match Instagram's supported aspect ratios, the app automatically crops or letterboxes your content. This can cut off important elements like text, faces, or product details. Images smaller than 1080px wide get upscaled, introducing visible blur and compression artifacts that make your content look unprofessional. Using the correct dimensions from the start ensures your images display at full resolution with no unwanted cropping. This is especially important for brand accounts, product photography, and any post where visual clarity drives engagement. A sharp, properly sized image signals quality to followers and the algorithm alike.
File Formats and Compression
Instagram supports JPG, PNG, and WebP image formats. JPG is ideal for photographs because it produces smaller file sizes with acceptable quality loss. PNG is better for graphics, screenshots, or any image with text — it preserves sharp edges without compression artifacts. Instagram re-compresses every image on upload regardless of the original format. To minimize quality loss, export at the highest quality setting your design tool offers, and keep the file under 8 MB. Images exported at exactly 1080px wide tend to experience the least re-compression because Instagram doesn't need to resize them.
The 3:4 Grid Update — and the New 3:4 Upload Size
In 2025, Instagram updated profile grids from 1:1 square thumbnails to 3:4 portrait thumbnails (roughly 1080x1440 px). Then in 2026, Instagram added 3:4 as a native upload size for feed posts — so a 1080x1440 image now displays uncropped in BOTH the feed and the grid. This makes 1080x1440 (3:4) the new optimal default. It takes up the most feed space (slightly taller than 4:5 — 1.33 ratio vs 1.25) and matches the grid exactly. Older guidance to design at 1080x1350 (4:5) still works in the feed, but those posts get trimmed top/bottom on the grid. Square (1:1) posts show with side bars on the grid. Anything taller than 3:4 (like 9:16) gets cropped down to 3:4 on upload.
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