Instagram Aspect Ratio Guide: 9:16, 4:5, 1:1, and 16:9 Explained
DropIG Editorial Team•5 min read•Verified for 2026 Standards
Master Instagram framing rules. Discover why 4:5 portrait posts get 35% higher screen retention than square photos.
Understanding aspect ratios is critical for high engagement. Here are the 4 standard ratios:
- **9:16 (Vertical Fullscreen)**: 1080 × 1920 px. Standard for Reels, Stories, and IGTV.
- **4:5 (Portrait In-Feed)**: 1080 × 1350 px. The ideal format for standard posts because it occupies maximum mobile screen real estate.
- **1:1 (Classic Square)**: 1080 × 1080 px. Great for carousel grids and product galleries.
- **1.91:1 (Horizontal Landscape)**: 1080 × 566 px. Cinematic widescreen photography.
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