The Ultimate Guide to Instagram Post Sizes in Pixels: Dimensions, Ratios, and Pro Tips

If you’ve ever spent hours designing the perfect graphic or editing a stunning photo, only to watch Instagram violently crop out your headline or compress your masterpiece into a blurry pixelated mess, you know the frustration.

Getting your image dimensions right is the secret weapon behind a clean, professional profile. Because Instagram automatically handles compression and scaling, uploading files at the exact optimal pixel dimensions ensures your content looks razor-sharp and commands attention as users scroll.

This complete guide breaks down every Instagram post size in pixels, aspect ratios, and the layout rules you need to know.

Instagram Post Sizes at a Glance

Whether you are building a grid strategy, dropping a Story, or launching a Reel, use this quick reference table to lock in your canvas dimensions before you start designing:

| Format | Aspect Ratio | Recommended Size (Pixels) | Best Used For |
| :— | :— | :— | :— |
| Square Feed Post | 1:1 | $1080 times 1080$ | Product catalogs, grid patterns, logos |
| Portrait Feed Post | 4:5 | $1080 times 1350$ | High-impact text graphics, portraits, ads |
| Tall Portrait Post | 3:4 | $1080 times 1440$ | Maximum feed real estate with exact grid alignment |
| Landscape Feed Post | 1.91:1 | $1080 times 566$ | Cinematic landscapes, group photos, wide banners |
| Stories & Reels | 9:16 | $1080 times 1920$ | Full-screen video and vertical graphics |
| Profile Picture | 1:1 | $320 times 320$ (minimum) | Brand logos and creator headshots (displays circular) |

Deep Dive: Feed Post Dimensions

Instagram supports a range of shapes for your feed, but choosing the right one changes how much screen space you control.

1. Portrait Posts ($1080 times 1350$ px or $1080 times 1440$ px)

If you want to stop the scroll, portrait is king.

• The 4:5 Ratio ($1080 times 1350$ px): This is the gold standard for most creators and marketers. It takes up maximum vertical space in the mobile feed without getting cut off, giving your audience more time to look at your visuals. It is also the safest choice if you plan to turn the organic post into an ad later.
• The 3:4 Ratio ($1080 times 1440$ px): This is the tallest feed shape Instagram natively supports. It fills your profile grid view seamlessly without the top and bottom edge-cropping that sometimes happens with 4:5 images.

2. Square Posts ($1080 times 1080$ px)

The classic 1:1 square is where Instagram started. While it doesn’t take up as much vertical room as a portrait post, it remains a reliable choice for product showcases, symmetrical grid layouts, or cross-posting assets from platforms like LinkedIn or X where square or horizontal formats dominate.

3. Landscape Posts ($1080 times 566$ px)

Landscape or horizontal photos have the smallest footprint on the feed. Because they occupy fewer vertical pixels, users can scroll past them very quickly. Save this layout exclusively for cinematic vistas, wide-angle architecture, or sweeping landscape photography where cropping would ruin the composition.

Full-Screen Content: Stories and Reels ($1080 times 1920$ px)

For immersive, full-screen content like Instagram Stories and Reels, the standard requirement is $1080 times 1920$ pixels (a 9:16 aspect ratio).