The shift to vertical formats

Social platforms in 2026 have standardized around three visual layouts: the 1:1 square, the 4:5 portrait, and the 9:16 vertical. Vertical formats consistently pull higher engagement in mobile feeds because they fill more of the screen. Below are the exact dimensions, platform by platform.

Meta: Instagram and Facebook

Instagram has made a significant structural shift. The platform's profile grid now displays thumbnails at a 3:4 aspect ratio, replacing the legacy 1:1 square preview. This means native 3:4 Feed post uploads at 1080 × 1440 are now recommended to prevent unwanted cropping on your profile.

  • Instagram Square Post: 1080 × 1080 (1:1) — Occupies less vertical space and crops to 3:4 on the profile grid.
  • Instagram Portrait Post: 1080 × 1350 (4:5) — Requires centered safe zones.
  • Instagram Tall Post (Recommended): 1080 × 1440 (3:4) — Displays perfectly on the grid with zero cropping.
  • Stories & Reels: 1080 × 1920 (9:16) — Platform UIs overlay icons and captions on the frame. On TikTok, avoid the top ~200px and bottom ~300px; on Instagram Reels, keep text out of the bottom 20%.
  • Facebook In-Feed (Portrait): 1080 × 1350 (or 1440 × 1800 for ads)
  • Facebook Shared Link (Open Graph): 1200 × 630

X (Twitter) and LinkedIn

X (formerly Twitter) timeline visual engagement is dominated by the 16:9 landscape ratio for single images, but it adapts based on multi-image layouts. LinkedIn operates as a primary distribution engine for professional content, where mobile engagement is heavily dominated by the vertical 4:5 layout.

  • X Single Feed Post (Landscape): 1600 × 900 (16:9) — Offers the largest timeline preview with zero cropping.
  • X Twitter Card (Large Summary): 1200 × 628 (1.91:1)
  • LinkedIn Single Feed Post (Vertical): 1200 × 1500 (4:5) — Wins 80%+ viewport real estate on mobile devices.
  • LinkedIn Link Image / Article Cover: 1200 × 627 (1.91:1)

YouTube

YouTube thumbnails remain one of the most critical factors driving click-through rate (CTR). While 1280 × 720 remains the standard, the rise of Smart TVs has introduced 4K thumbnail support.

  • Standard Video Thumbnail: 1280 × 720 (16:9)
  • 4K Optimized Thumbnail: 3840 × 2160 (16:9) — Supported for desktop uploads; renders sharper on Smart TVs and high-DPI displays.
  • YouTube Shorts: 1080 × 1920 (9:16) — Avoid placing text in the bottom 15–20% to clear interface overlays.
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TikTok and Pinterest

As entirely mobile-first platforms, TikTok requires vertical 9:16 aspect ratios. Pinterest operates a vertically oriented masonry grid, favoring the 2:3 ratio.

  • TikTok Organic Video / Story: 1080 × 1920 (9:16)
  • TikTok Photo Mode (Portrait): 1080 × 1920 (9:16) — Supports 4 to 35 slides.
  • Pinterest Standard Pin: 1000 × 1500 (2:3) — Taller assets (up to 1000 × 2100) get truncated in the feed.
  • Pinterest Idea Pin: 1080 × 1920 (9:16)

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