One wrong image size can cost a campaign its first impression: logos get clipped, photos soften under compression and feed cards lose impact. For most brands in 2026, the fastest fix is operational, not creative — standardize three master builds and export only when a placement strictly requires a different ratio.

This guide (last updated October 15, 2026) gives the practical rules and platform dimensions you need now: the three safe masters to create, file‑type rules and a concise cheat sheet of profile, cover and primary post sizes.

Start with the universal rules

Use one of three “safe” build sizes as your baseline and resize only when a placement requires it:

  • 1080 × 1080 px (1:1) — the safest single file for standard feed posts across Instagram, Facebook, X, LinkedIn, Threads and Bluesky without automatic cropping.
  • 1080 × 1350 px (4:5) — the preferred vertical feed image on mobile when you need more screen real estate.
  • 1080 × 1920 px (9:16) — full‑screen vertical for Stories, Reels, TikTok photo mode, Snapchat and Shorts.

Pinterest is the main exception: it favors taller pins (around 1000 × 1500 px or a 2:3 ratio) rather than strictly following the 1080‑pixel width rule.

Practical file and layout guidance

Follow these rules to preserve image quality and avoid layout surprises:

  • File types: use JPG for photographs to keep file sizes small; use PNG for graphics with text, logos or sharp edges.
  • Upload quality: export the highest‑quality file that stays within the platform’s file‑size limit and let the platform compress as needed.
  • Safe composition: keep important text and logos away from edges. Circular crops, profile overlays and UI elements can clip content—center critical elements and allow margin for cropping.
  • API constraints: platform APIs often enforce stricter aspect ranges than the apps. For example, Instagram’s API accepts feed images between 4:5 and 1.91:1; files outside that range may be rejected or auto‑cropped.

Key platform cheat sheet (profile, cover, primary post)

Use these baseline dimensions as a starting point for builds. They cover profile photos, cover/banner images and a primary feed image size for each service.

  • Instagram — Profile: 320×320 px; Cover/hero: N/A; Primary post: 1080×1080 px or 1080×1350 px.
  • Facebook — Profile: 320×320 px; Cover: 851×315 px; Primary post: 1080×1350 px.
  • X (Twitter) — Profile: 400×400 px; Cover: 1500×500 px; Primary post: 1600×900 px.
  • LinkedIn — Profile: 400×400 px; Cover: 4200×700 px; Primary post: 1200×627 px.
  • TikTok — Profile: 200×200 px; Cover: N/A; Primary post: 1080×1920 px.
  • YouTube — Profile: 800×800 px; Channel banner: 2560×1440 px; Primary thumbnail/video frame: 1280×720 px.
  • Pinterest — Profile: 165×165 px; Cover: 800×450 px; Primary pin: 735×1102 px.
  • Snapchat — Profile: 320×320 px; Cover: 375×569 px; Primary story: 1080×1920 px.
  • Threads — Profile: 320×320 px; Cover: N/A; Primary post: 1080×1080 px.
  • Bluesky — Profile: 400×400 px; Cover: 1500×1500 px; Primary post: 1080×1080 px.
  • Google Business Profile — Profile: 720×720 px; Cover: 1024×576 px; Primary post image: 1200×900 px.

Placement notes that affect composition

Pixel dimensions matter, but placement behavior dictates what you actually see in the wild:

  • Facebook covers: mobile and desktop crop differently—plan key content away from the left and right edges and expect profile images to overlap the cover area.
  • Facebook timeline images: square images (1080×1080 px) are safe; vertical 4:5 images (e.g., 1440×1800 px) occupy more feed space when appropriate.
  • Instagram Reels and Stories: build at 1080×1920 px. Keep a safe zone—roughly 14% from the top and around 20% from the bottom—so profile icons and UI elements don’t occlude calls to action or logos.
  • Grid thumbnails: Instagram’s grid reduces image size substantially—ensure text and logos remain legible at thumbnail scale.

Design with a safe area in mind and center critical content rather than relying on edge placement.

Workflow recommendations for teams

  • Create three source masters for each campaign: square (1080×1080), tall feed (1080×1350) and vertical full‑screen (1080×1920). Export from those masters to platform specs as needed.
  • Use consistent asset naming that includes aspect and placement (for example: campaignX_IG_FEED_1080x1350.jpg) so scheduling and ad tools select the correct file at publish time.
  • Automate resizing where possible, but visually inspect auto‑resized exports—text legibility and logo placement often need manual tweaks.

Adopt these rules to reduce rework, avoid last‑minute cropping surprises and keep brand elements intact across placements.

What to watch next

Prioritize a small, validated set of master builds, add automated validation checks to your publishing workflow, and test on real devices and feeds before a major campaign goes live. Platform APIs and in‑app display rules do change; re‑verify specs ahead of high‑stakes launches and treat the three masters above as your baseline control set.