The Ultimate Guide to Instagram Post Sizes in Pixels

In the fast-paced world of social media, first impressions are everything. You might have stunning photography, witty copywriting, and a brilliant marketing strategy, but if your images look blurry, awkwardly cropped, or pixelated, you risk losing your audience’s attention in a fraction of a second.

Instagram automatically compresses and scales uploads, but starting with the exact right pixel dimensions ensures your visuals look crisp, professional, and optimized for every screen. Whether you are a brand, a content creator, or just looking to elevate your personal feed, here is your definitive, up-to-date guide to Instagram post sizes in pixels.

1. Feed Posts: The Core of Your Profile

The Instagram feed supports three main aspect ratios for static images and carousels: square, portrait, and landscape.

Portrait / Vertical (4:5 Ratio) — The Creator’s Choice

• Recommended Size: 1080 x 1350 pixels
• Why use it: Portrait posts take up the most vertical real estate on a user’s mobile screen, pushing competing content out of view and naturally driving higher engagement and dwell time. If you want your posts to stand out as people scroll through their feeds, this is the gold standard.

Square (1:1 Ratio) — The Classic

• Recommended Size: 1080 x 1080 pixels
• Why use it: While vertical posts dominate feeds today, the classic square remains a reliable, clean choice. It ensures your images look balanced both on your grid profile and in the main feed without any surprises during cropping.

Landscape / Horizontal (1.91:1 Ratio) — Cinematic & Wide

• Recommended Size: 1080 x 566 pixels
• Why use it: Best for cinematic shots, landscapes, or wide architectural photography. Note that horizontal images will have automatic letterboxing (black or white bars) applied top and bottom to fit Instagram’s grid layout.

2. Full-Screen Formats: Stories & Reels

Content that lives fullscreen—disappearing after 24 hours or driving discovery through Reels—requires vertical dimensions.

Instagram Stories & Reels Covers (9:16 Ratio)

• Recommended Size: 1080 x 1920 pixels
• Why use it: This fills the entire height and width of a standard smartphone screen.
• Pro-Tip for Stories/Reels: Keep critical text, stickers, and calls-to-action within the “safe zones” (leaving roughly 250px free at the top and bottom) so they aren’t obscured by profile icons, captions, or navigation buttons.

3. Carousel Posts: Consistency is Key

Carousels allow you to share up to 10 images or videos in a single post.

• Rule of Thumb: Whichever aspect ratio you choose for your first slide (