The Ultimate Guide to LinkedIn Ads Sizes and Specs (2026 Edition)

Navigating the world of paid social media can sometimes feel like trying to fit a square peg into a round hole—literally. When it comes to LinkedIn Ads, getting your dimensions right is the difference between a sleek, professional campaign that drives high-value B2B leads and a pixelated, truncated mess that gets scrolled past in seconds.

Because LinkedIn is the premier professional network, your visual assets need to reflect top-tier corporate standards. This comprehensive guide breaks down all the essential LinkedIn ad sizes, aspect ratios, and file specs you need for a successful campaign.

1. Single Image Ads (Sponsored Content)

Single image ads appear directly in the LinkedIn feed, making them one of the most versatile and common formats for brand awareness, lead generation, and content promotion.

• Landscape (Horizontal)
  • Aspect Ratio: 1.91:1
  • Recommended Size: 1200 x 627 pixels
  • Best For: Website traffic and sharing blog posts or whitepapers.
• Square
  • Aspect Ratio: 1:1
  • Recommended Size: 1080 x 1080 pixels
  • Best For: Product highlights, infographics, and stopping the scroll on mobile feeds.
• Vertical (Portrait)
  • Aspect Ratio: 4:5
  • Recommended Size: 1080 x 1350 pixels
  • Best For: Maximizing mobile screen real estate and driving higher engagement rates.
• File Requirements: JPEG or PNG; max file size 5MB.

2. Carousel Image Ads

Carousel ads let you showcase multiple scrollable cards in a single ad unit. They are fantastic for telling a step-by-step story, highlighting different product features, or breaking down complex data.

• Aspect Ratio: 1:1 (Square)
• Recommended Size: 1080 x 1080 pixels per card
• Number of Cards: 2 to 10 cards per carousel
• File Requirements: JPEG or PNG; max file size 10MB per card.

3. Video Ads

Video is one of the most engaging mediums on LinkedIn, allowing you to humanize your brand, showcase customer testimonials, or explain complex software in motion.

• Landscape Video: 16:9 ratio (Recommended: 1920 x 1080 pixels)
• Square Video: 1:1 ratio (Recommended: 1080 x 1080 pixels)
• Vertical Video: 9:16 or 4:5 ratio (Vertical video takes up significantly more mobile screen space and often yields higher view-through rates).
• Length: 3 seconds to 30 minutes (though 15 to 30 seconds typically performs best for awareness).
• File Requirements: MP4 format; max file size 200MB.

4. Text and Lead Gen Form Assets

Not all ads require massive visual graphics. Text-based formats rely heavily on clean branding and punchy copywriting.

• Thought Leader Ads / Sponsored Updates: Utilize the standard single image or video specs mentioned above, paired with a clear, thought-provoking executive message.
• Lead Gen Form Company Logo:
  • Recommended Size: 100 x 100 pixels (Square)
  • File Requirements: PNG or JPEG; max file size 2MB.

Quick Reference Summary Table

| Ad Format | Recommended Dimensions (px) | Aspect Ratio | File Type | Max File Size |
| :— | :— | :— | :— | :— |
| Single Image (Square) | 1080 x 1080 | 1:1 | JPEG, PNG | 5 MB |
| Single Image (Vertical) | 1080 x 1350 | 4:5 | JPEG, PNG | 5 MB |
| Single Image (Landscape) | 1200 x 627 | 1.91:1 | JPEG, PNG | 5 MB |
| Carousel Card | 1080 x 1080 | 1:1 | JPEG, PNG | 10 MB |
| Video (Landscape) | 1920 x 1080 | 16:9 | MP4 | 200 MB |
| Lead Gen Logo | 100 x 100 | 1:1 | JPEG, PNG | 2 MB |

Best Practices for LinkedIn Ad Design

1. Design for Mobile First: Over 60% of LinkedIn traffic originates from mobile devices. Vertical and square formats ensure your ads take up valuable screen space where users spend most of their time scrolling.
2. Keep Text Minimal: Avoid cluttering your images with dense paragraphs. Let your primary ad copy do the heavy lifting while the visual grabs attention.
3. Include a Clear Call-to-Action (CTA): Always use LinkedIn’s native CTA buttons (