Meta Ad Specs & Sizes 2026: Facebook & Instagram Reference
Adspirer Team
META AD SPECS 2026
The current Meta ad specs for Facebook and Instagram — dimensions, aspect ratios, and file limits for every major format — in one reference. Bookmark it. Meta tweaks the edges, but the core specs below are the safe-bet sizes for 2026.
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Image, video, Stories, Reels, and carousel — all in one table
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The safe-bet aspect ratios that render everywhere
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File-size and length limits so nothing gets rejected
Meta ad specs — the dimensions, aspect ratios, and file limits for Facebook and Instagram ads — change at the edges every year, but the core safe-bet sizes are stable. This is the 2026 reference. When in doubt, design to the ratios below and your creative renders cleanly across feed, Stories, and Reels.
The fast answer: design to these ratios
The three ratios that cover almost everything
Build these and you'll render across the placements that matter.
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1:1 (1080×1080) — Square — the universal feed image. Safe across Facebook and Instagram feed.
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4:5 (1080×1350) — Vertical feed — takes more mobile screen than square and usually wins on feed.
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9:16 (1080×1920) — Full-screen vertical — Stories and Reels. The format most spend is shifting to.
Image ad specs
| Spec | Recommendation |
|---|---|
| Feed ratio | 1:1 (1080×1080) or 4:5 (1080×1350) |
| Resolution | At least 1080×1080 |
| File type | JPG or PNG |
| Max file size | 30 MB |
| Primary text | ~125 characters before truncation |
| Headline | ~27–40 characters |
Video ad specs
| Spec | Recommendation |
|---|---|
| Feed ratio | 4:5 (1080×1350) or 1:1 |
| Stories / Reels ratio | 9:16 (1080×1920) |
| File type | MP4 or MOV |
| Max file size | Up to 4 GB |
| Feed length | Keep it short — most results land in the first few seconds |
| Reels length | Up to ~90 seconds; shorter usually performs |
| Captions | Add them — most video is watched on mute |
Stories & Reels
| Spec | Recommendation |
|---|---|
| Ratio | 9:16 (1080×1920) |
| Safe zone | Keep text/logos clear of the top ~14% and bottom ~20% (UI overlays) |
| Format | Vertical video or image |
Carousel ads
| Spec | Recommendation |
|---|---|
| Cards | 2–10 |
| Card ratio | 1:1 (1080×1080) |
| Per-card file | Image 30 MB / Video 4 GB |
Design vertical (4:5 or 9:16) and add captions. The single biggest spec mistake in 2026 is shipping square, repurposed-from-desktop creative into a mobile, sound-off, vertical-first feed. The aspect ratio is a bigger lever than any pixel detail in this table.
Launch to spec from an AI agent
Once your creative is built to spec, you can launch and manage the campaign without the dashboard. Adspirer connects ChatGPT or Claude to Meta through MCP — so you brief the campaign in plain English and the agent builds it (paused, for your review). It can also audit live creative for fatigue once it’s running.
Common questions
Frequently asked questions
Capabilities
Ad formats
Safety & control
Related reading
- Facebook Ads audit: the complete 2026 checklist
- Facebook ad cost calculator
- Connect Claude to Meta Ads
- Meta Ads MCP: connect Facebook & Instagram to an AI agent
- Facebook advertising automation
Creative to spec? Launch it from chat.
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