Why the Right Image Size Matters
Every platform crops, scales and recompresses what you upload. Start with the correct dimensions and aspect ratio and your image stays sharp, your subject stays inside the frame, and nothing important is cut by the interface.
The Aspect Ratios That Matter in 2026
- 4:5 (1080x1350) takes the most vertical room in the Instagram feed and generally performs best for photos.
- 9:16 (1080x1920) is the standard for Stories, Reels, TikTok and YouTube Shorts. Keep text away from the top and bottom, where buttons and captions overlay.
- 1:1 (1080x1080) is the universal, safe-everywhere format.
- 16:9 (1280x720) is the YouTube thumbnail and link-preview standard.
Fill vs Fit
Fill scales the image to cover the whole frame and crops the overflow, which is what you want for most posts. Fit keeps the entire image visible and adds coloured bars, useful for infographics and screenshots where nothing may be cropped.
Tips for Sharper Uploads
Export as JPG for photos and PNG for graphics with text or sharp edges. Upload at the listed size rather than larger, because platforms downscale aggressively and oversized files get recompressed harder. Keep key content inside the central safe area.