Meta Video Ad Specs Guide 2026: Every Format & Size

You just finished a killer video ad. You upload it to Meta Ads Manager — and it gets cropped, stretched, or rejected. 47% of advertisers report uploading at least one incorrectly formatted video per month, according to a 2025 Databox survey. That is wasted production time and delayed campaign launches.

This guide gives you every Meta video ad specification in one place: Facebook and Instagram, Feed to Reels, exact dimensions and file limits. Bookmark it and never guess at specs again.

Master Specs Table: Every Meta Video Ad Format

Here is the complete reference. Every format, every placement, every number you need.

Facebook Video Ad Specs — Detailed Breakdown

Facebook Feed Video Ads

The Feed remains Facebook's highest-volume ad placement. 4:5 is the optimal aspect ratio because it occupies more vertical screen space than 1:1 or 16:9, increasing visibility in the scroll.

Specifications:

• Recommended aspect ratio: 4:5 (1080×1350)
• Also accepted: 1:1 (1080×1080), 16:9 (1920×1080)
• Minimum resolution: 120×120 pixels
• Maximum duration: 241 minutes (but keep ads under 60 seconds)
• File types: MP4, MOV, GIF
• Maximum file size: 4 GB
• Recommended frame rate: 30 fps
• Captions: Strongly recommended (85% of Facebook video is watched without sound)
• Text safe zone: Keep critical text/CTA within the center 80% of the frame

Performance note: Facebook's own data shows 4:5 videos achieve 12-15% higher completion rates than 16:9 on mobile devices. Always prioritize mobile-optimized aspect ratios.

Facebook Stories Video Ads

Stories ads appear full-screen between organic stories, offering an immersive, distraction-free format.

Specifications:

• Aspect ratio: 9:16 (1080×1920)
• Duration: 1-120 seconds
• Recommended length: 5-15 seconds per card (Meta auto-splits longer videos)
• Safe zone: Keep text and logos within the center 1080×1420 area — the top 250px and bottom 250px are occupied by the profile bar and CTA button
• File types: MP4, MOV
• Sound: Recommended on (unlike Feed, most Stories viewers have sound enabled)

Facebook Reels Video Ads

Reels ads are Meta's fastest-growing placement, appearing between organic Reels content in the vertical video feed.

Specifications:

• Aspect ratio: 9:16 (1080×1920)
• Duration: 3-90 seconds (Meta recommends 15-30 seconds for ads)
• Safe zone: Similar to Stories — center 1080×1420 for text
• Style: Native, vertical, fast-paced — polished brand content underperforms native-style content
• Music: Adding trending audio can boost engagement
• Looping: Reels loop by default; design your ending to flow into the beginning

Performance note: Reels ads deliver up to 30% lower CPM compared to Feed in many verticals, making this a high-priority format for cost-efficient reach.

Facebook In-Stream Video Ads

In-Stream ads play during or before video content from Facebook's partner publishers. This is the only Facebook placement where 16:9 is the primary format.

Specifications:

• Aspect ratio: 16:9 (1920×1080)
• Duration: 5-15 seconds (non-skippable) or up to 10 minutes (skippable after 5 seconds)
• File types: MP4, MOV
• Sound: Required (viewers are already watching video content with sound on)
• Recommended approach: Front-load your message in the first 5 seconds

Instagram Video Ad Specs — Detailed Breakdown

Instagram Feed Video Ads

Instagram Feed ads appear in the main scrollable feed. Instagram's audience skews younger and more visual than Facebook, demanding higher creative quality standards.

Specifications:

• Recommended aspect ratio: 4:5 (1080×1350)
• Also accepted: 1:1 (1080×1080), 16:9 (landscape — less common)
• Maximum duration: 120 seconds
• Recommended duration: 15-30 seconds
• Minimum resolution: 500 pixels wide
• Thumbnail: Auto-generated from the first frame; choose a strong opening visual
• Captions: Essential — most viewing is sound-off

Best practice: Instagram Feed rewards aesthetic quality more than Facebook. Ensure your opening frame would work as a standalone image — it needs to stop the scroll before the video even begins playing.

Instagram Stories Video Ads

Stories is Instagram's second-highest ad inventory after Feed. Full-screen, vertical, and immersive.

Specifications:

• Aspect ratio: 9:16 (1080×1920)
• Duration: 1-120 seconds
• Cards: Videos over 15 seconds are split into cards automatically
• Safe zone: Keep key content within center 1080×1420
• Interactive elements: Polls, quizzes, and stickers can be added via Ads Manager
• Swipe-up/CTA button: Placed at the bottom — do not design your own CTA in that area

Instagram Reels Video Ads

Instagram Reels is the platform's fastest-growing format. Ads here appear between organic Reels and must match the native, entertaining aesthetic.

Specifications:

• Aspect ratio: 9:16 (1080×1920)
• Duration: 3-90 seconds
• Recommended length: 15-30 seconds
• Style: Must feel native to the Reels experience — overly branded content is penalized by the algorithm and ignored by users
• Audio: Strongly recommended (Reels viewers expect sound)
• Captions: Add as burned-in text overlays, not just as a separate caption track

Technical Requirements Across All Formats

Video File Specifications

Caption and Text Specifications

Thumbnail Best Practices

Meta auto-selects a video thumbnail, but you can override it:

• Use the first frame as your designed thumbnail — many users see it before autoplay
• Minimum 1080 pixels wide
• No more than 20% text on the thumbnail (Meta may reduce delivery)
• High contrast and clear subject — it needs to work at mobile size

Format Selection Strategy for Advertisers

Not sure which format to prioritize? Here is a practical decision framework:

For Maximum Reach and Scale

• Primary: 4:5 Feed + 9:16 Reels (covers 80% of inventory)
• Secondary: 9:16 Stories
• Optional: 16:9 In-Stream

For E-Commerce Product Ads

• Primary: 4:5 Feed (best for product showcases with clear CTA)
• Secondary: 9:16 Reels (for UGC-style product demos)
• Use AI tools: AdConvert's Video Ad Generator can auto-export in all required formats from a single source

For Brand Awareness

• Primary: 9:16 Reels (lowest CPM, highest reach)
• Secondary: 16:9 In-Stream (captive audience, sound-on)
• Supporting: 9:16 Stories

For Retargeting

• Primary: 4:5 Feed (detailed product information, clear CTA)
• Secondary: 1:1 Feed (universal compatibility)
• Use longer formats (30-60 seconds) with more product detail and social proof

Common Spec Mistakes That Kill Ad Performance

1. Wrong aspect ratio for placement Uploading 16:9 video for Stories or Reels results in a tiny video with massive black bars. Always create 9:16 for vertical placements.

2. Text in the danger zone Placing important text in the top or bottom 14% of Stories/Reels videos means it gets hidden behind UI elements. Use the center safe zone.

3. Unreadable text at mobile size Your creative looks great on your 27-inch monitor but becomes illegible on a phone screen. Test at actual mobile resolution.

4. No sound-off design 85% of Facebook Feed viewing is sound-off. If your ad relies on voiceover with no captions or visual storytelling, you are losing most of your audience.

5. Oversized files causing slow loads While Meta allows up to 4 GB, keep files under 500 MB for fastest delivery. Compress with H.264 at medium bitrate (8-12 Mbps for 1080p).

For a complete walkthrough of creating video ads that meet all these specs, see our AI video ad creation guide.

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