Ad SpecificationsLinkedIn

LinkedIn Ads Specifications 2025

Complete guide to LinkedIn ad specifications including Single Image, Video, Carousel, Document Ads, and the new CTV format. Character limits, dimensions, and best practices.

8 min read
Updated January 28, 2026

Overview

LinkedIn offers various ad formats for B2B marketers, with specific requirements for each placement. This guide covers all formats including the new Connected TV (CTV) ads introduced in 2024.

Single Image Ads

SpecRequirement
Image Ratio1.91:1 (landscape) or 1:1 (square)
Resolution1200×628 px (landscape), 1200×1200 px (square)
File TypeJPG, PNG, GIF (non-animated)
Max File Size5 MB
Headline70 characters (truncates on mobile)
Intro Text150 characters (600 max, truncates at 150)

Video Ads

SpecRequirement
Aspect Ratio16:9, 1:1, or 9:16
Resolution360×360 min to 1920×1920 max
Duration3 seconds to 30 minutes
File Size75 KB min to 200 MB max
FormatMP4
Frame RateLess than 30 FPS
Best Practice: Keep videos under 30 seconds for optimal engagement. Include captions for sound-off viewing.

Carousel Ads

  • 2-10 cards per carousel
  • Image: 1:1 aspect ratio, 1080×1080 px
  • Max file size: 10 MB per image
  • Headline per card: 45 characters
  • Intro text: 255 characters (truncates at 150)

Document Ads

SpecRequirement
File TypesPDF, DOC, DOCX, PPT, PPTX
Max File Size100 MB
Max Pages300 pages (10 recommended)
Headline70 characters
Intro Text150 characters

Connected TV (CTV) Ads

New in 2024! Reach LinkedIn audiences on streaming devices.

SpecRequirement
Dimensions1920×1080 px
Aspect Ratio16:9
FormatMP4
Duration6-60 seconds (6, 15, 30, 45, 60s recommended)
Max File Size500 MB
Bit Rate12 Mbps+ (15-40 Mbps recommended)
Frame Rate29.97 fps recommended

Lead Gen Forms

  • Headline: 60 characters
  • Description: 70 characters
  • Form fields: 3-4 recommended (max 12)
  • Custom image: Optional but recommended

Message Ads

  • Message text: Up to 1,500 characters
  • CTA button: 20 characters
  • Banner (desktop): 300×250 px, 2 MB max

Key Best Practices

  1. 1. Audience Size: Minimum 50,000 members recommended
  2. 2. Budget: $100/day minimum for optimal results
  3. 3. A/B Testing: Create 3-5 ad variations
  4. 4. Video Captions: Essential for sound-off viewing
  5. 5. Vertical Video: Prioritize 9:16 for mobile placements

Official Sources:
  • [LinkedIn Marketing Solutions](https://business.linkedin.com/marketing-solutions/ads/ad-specs)
  • [LinkedIn Ads Specs](https://business.linkedin.com/advertise/ads/sponsored-content/single-image-ads-specs)
Last verified: January 2026

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