Understanding aspect ratios is critical for high engagement. Here are the 4 standard ratios:
1. 9:16 (Vertical Fullscreen): 1080 × 1920 px. Standard for Reels, Stories, and IGTV.
2. 4:5 (Portrait In-Feed): 1080 × 1350 px. The ideal format for standard posts because it occupies maximum mobile screen real estate.
3. 1:1 (Classic Square): 1080 × 1080 px. Great for carousel grids and product galleries.
4. 1.91:1 (Horizontal Landscape): 1080 × 566 px. Cinematic widescreen photography.