Published July 6, 2026
Instagram and TikTok primarily use a 9:16 vertical format (1080x1920px) for Stories and Reels. Facebook Feed ads use 1:1 square (1080x1080px) or 4:5 vertical. Google Display Ads commonly use 1.91:1 landscape (1200x628px) or 1:1 square. Matching the native aspect ratio avoids automatic cropping that can cut off product or text.
Instagram Feed posts use 1:1 square (1080x1080px) or 4:5 vertical (1080x1350px) for maximum vertical space in-feed. Instagram Stories and Reels use 9:16 vertical (1080x1920px) full-screen format.
Facebook Feed ads perform best at 1:1 square (1080x1080px) or 4:5 vertical, since both formats occupy more vertical space on mobile feeds than a landscape image. Facebook Stories ads use the same 9:16 vertical format as Instagram Stories.
TikTok ads are full-screen vertical video or image at 9:16 (1080x1920px). Content designed for horizontal or square formats gets letterboxed and loses impact in TikTok's native feed experience.
Google Display Network ads commonly use 1.91:1 landscape (1200x628px), 1:1 square (1200x1200px), or 300x250px for smaller display placements. Google Search ads do not use images directly, but Performance Max campaigns require all three formats.
AI ad generators that support aspect-ratio selection at generation time (square, landscape, portrait) avoid the quality loss and awkward cropping that comes from resizing a single image after the fact for multiple platforms.
Instagram Stories use a 9:16 vertical aspect ratio at 1080x1920 pixels.
1:1 square (1080x1080px) or 4:5 vertical (1080x1350px) both perform well, since they occupy more vertical space on mobile feeds than a landscape image.
TikTok is built for 9:16 full-screen vertical content. Square or landscape content gets letterboxed and performs worse in TikTok's native feed.
Google Display and Performance Max campaigns commonly require 1.91:1 landscape (1200x628px), 1:1 square (1200x1200px), and a smaller 300x250px display size.