Instagram Post Size
Common Instagram dimensions: 1080x1080 (square), 1080x1350 (portrait), and 1080x1920 (stories and reels).
Every Instagram format, by dimensions
| Format | Size | Ratio |
|---|---|---|
| Square post | 1080 x 1080 px | 1:1 |
| Portrait post | 1080 x 1350 px | 4:5 |
| Landscape post | 1080 x 566 px | 1.91:1 |
| Story / Reel | 1080 x 1920 px | 9:16 |
Choosing the right Instagram format
Creators searching for Instagram post size usually need immediate format confirmation before export. The best starting point for feed reach is often 1080 x 1350 (4:5), because it uses more vertical screen space than square posts while still fitting feed behavior. Square 1080 x 1080 remains useful for product grids and template consistency.
Stories and reels rely on 1080 x 1920 in a 9:16 ratio. Correct dimensions reduce blur and prevent accidental crop loss around captions and visual focal points.
Mistakes to avoid
- Uploading a landscape photo wider than 1.91:1 — Instagram crops it down automatically, often cutting the edges of the subject.
- Sizing a carousel's slides differently from each other — mixed dimensions cause jarring crops as users swipe between slides.
- Placing text near the very bottom of a Reel cover — the caption, username, and action buttons overlap that area on most devices.
FAQ
What's the minimum resolution Instagram accepts?
Instagram recompresses most uploads, but starting below 1080px wide on the long edge will look visibly soft after their compression. Export at 1080px or higher and let Instagram downscale if needed, never the reverse.
Does a portrait post get cropped in the grid view?
Yes — the profile grid always shows a 1:1 square preview, even for 4:5 portrait posts. Keep your main subject centered so it survives that grid crop.