The Blueprint to LinkedIn Ad Dimensions & Specifications

Running campaigns on LinkedIn provides unmatched reach to decision-makers, B2B buyers, and industry professionals. However, even the most persuasive ad copy and striking visuals fall flat if your media ends up pixelated, cropped awkwardly, or cut off by interface overlays.

Getting your LinkedIn ad sizes and specifications right ensures your visual assets look crisp, professional, and optimized for maximum engagement on both mobile feeds and desktop screens.

1. Single Image Ads

Single Image Ads appear directly in the LinkedIn user feed. Because they mirror native posts, maintaining high image quality and proper aspect ratios is key to blending naturally into the feed while standing out visually.

Specifications & Dimensions

• Square Ratio (1:1): 1080 × 1080 pixels (Recommended for mobile feeds)
• Vertical Ratio (4:5): 1080 × 1350 pixels (Maximizes screen real estate on mobile devices)
• Landscape Ratio (1.91:1): 1200 × 627 pixels (Best suited for desktop audiences)
• Supported File Types: JPG, PNG, GIF (non-animated)
• Maximum File Size: 5 MB

Character Limits

• Ad Name (Internal): 255 characters
• Introductory Text: 150 characters (truncated on mobile after ~150 characters)
• Headline: 70 characters
• Description: 100 characters

2. Carousel Ads

Carousel Ads allow marketers to feature multiple cards in a single swipeable unit. They are ideal for step-by-step storytelling, highlighting distinct product features, or showcasing a series of case studies.

| Asset Element | Specification |
| :— | :— |
| Card Image Size | 1080 × 1080 pixels (1:1 aspect ratio) |
| Number of Cards | 2 to 10 cards per ad unit |
| File Format | JPG, PNG, GIF (non-animated)Navigating LinkedIn’s ad specifications can feel like trying to hit a moving target. With constant updates to the feed layout and mobile display standards, using the wrong image dimensions, video aspect ratio, or character count will result in cropped visuals and truncated copy.

To help you build crisp, high-converting LinkedIn campaigns, here is the complete guide to LinkedIn ad sizes, specs, and best practices for 2026.

1. Single Image Ads

Single Image Ads are the bread and butter of LinkedIn advertising. They appear directly in the main feed on both desktop and mobile devices.

• Landscape (Horizontal):
  • Recommended Ratio: $1.91:1$
  • Recommended Resolution: $1200 times 627text{ px}$
• Square:
  • Recommended Ratio: $1:1$
  • Recommended Resolution: $1200 times 1200text{ px}$
• Vertical (Mobile-focused):
  • Recommended Ratio: $4:5$ or $1:1.91$
  • Recommended Resolution: $1080 times 1350text{ px}$
• Technical Constraints:
  • File Types: PNG or JPG
  • Max File Size: 5 MB
• Text Specifications:
  • Headline: Max 200 characters (70 characters recommended to avoid truncation).
  • Introductory Text: Max 600 characters (150 characters recommended before the “See more” fold).

Pro-Tip: Square ($1:1$) and Vertical ($4:5$) image dimensions occupy significantly more screen real estate on mobile devices compared to traditional landscape images, driving higher engagement rates.

2. Carousel Ads

Carousel ads allow you to showcase multiple images in a swipeable horizontal series (2 to 10 cards), making them ideal for storytelling or product showcases.

• Recommended Ratio: $1:1$ (Square)
• Recommended Resolution: $1080 times 1080text{ px}$ or $1200 times 1200text{ px}$
• Technical Constraints:
  • Card Count: 2 to 10 cards
  • File Types: PNG or JPG
  • Max File Size: 10 MB per image
• Text Specifications:
  • Card Headline: Max 45 characters (keep it under 30 for mobile readability).
  • Introductory Text: Max 255 characters (around 150 recommended).

3. Video Ads

Video ads are among the most dynamic formats for driving brand awareness and consideration.

• Aspect Ratios & Dimensions:
  • Landscape: $16:9$ ($1920 times 1080text{ px}$)
  • Square: $1:1$ ($1080 times 1080text{ px}$)
  • Vertical: $9:16$ ($1080 times 1920text{ px}$)
• Technical Constraints:
  • Length: 3 seconds to 30 minutes (15–30 seconds works best for top-of-funnel conversion).
  • File Format: MP4
  • Max File Size: 200 MB
  • Frame Rate: 30 FPS
  • Audio: AAC or MP3 (79% of LinkedIn feed videos are watched with sound off; captions are highly recommended).
• Text Specifications:
  • Headline: Max 200 characters.
  • Introductory Text: Max 600 characters.

4. Document Ads

Document Ads allow members to read, preview, and download documents (