The Ultimate Guide to LinkedIn Ad Sizes and Specs for 2026

When it comes to B2B marketing, LinkedIn is the premier platform for reaching decision-makers, industry leaders, and high-value talent. However, even the most compelling copy and targeted audience strategy will fall flat if your creative assets are blurry, awkwardly cropped, or poorly formatted.

Getting your dimensions right is the non-negotiable foundation of high-performing campaigns. This comprehensive guide breaks down the essential LinkedIn ad sizes for every major format so you can design with confidence and maximize your return on ad spend (ROAS).

1. Single Image Ads (Sponsored Content)

Single image ads appear directly in the LinkedIn feed, looking just like organic posts. They are versatile, easy to produce, and exceptional for brand awareness and lead generation.

Depending on your design preference, you can choose from three primary aspect ratios:

• Square (1:1)
  • Recommended Size: 1200 x 1200 pixels
  • Best for: Balanced visual storytelling that looks great on both desktop and mobile feeds.
• Landscape (1.91:1)
  • Recommended Size: 1200 x 627 pixels
  • Best for: Cinematic imagery, landscape photography, or showcasing wider product interfaces.
• Vertical (4:5)
  • Recommended Size: 1080 x 1350 pixels
  • Best for: Maximizing screen real estate on mobile devices to grab attention as users scroll.

File type requirements: JPG or PNG (under 5MB).

2. Carousel Image Ads

Carousel ads let you swipe through multiple cards, making them ideal for telling a step-by-step story, highlighting a product suite, or sharing statistics.

• Recommended Size: 1080 x 1080 pixels (Square, 1:1 aspect ratio)
• Number of Cards: 2 to 10 cards per carousel
• File Size: Up to 10MB per card
• File Types: JPG, PNG, or non-animated GIF

3. Video Ads

Video is one of the most engaging mediums on LinkedIn, perfect for customer testimonials, product demos, or thought leadership snippets.

• Aspect Ratios & Resolutions:
  • Landscape (16:9): 1920 x 1080 or 1280 x 720 pixels
  • Square (1:1): 1080 x 1080 or 600 x 600 pixels
  • Vertical (9:16): 1080 x 1920 pixels (great for mobile-first viewing)
• File Size: 75 KB to 200 MB
• Video Length: 3 seconds to 30 minutes (though 15–30 seconds typically yields the highest completion rates).

4. Text and Dynamic Ads

Text and dynamic ads run quietly on the right-hand rail of the desktop experience. While small, they are powerful for targeted lead generation and follower growth.

• Follower/Spotlight Ads (Dynamic):
  • Company Logo Size: 100 x 100 pixels (minimum)
  • Custom Background Image (Spotlight Ads only): 300 x 250 pixels
• Text Ads:
  • Image Size (Optional): 100 x 100 pixels
  • Headline: Up to 25 characters
  • Description: Up to 75 characters

Best Practices for LinkedIn Ad Design

1. Design for Mobile First: Over 60% of LinkedIn traffic originates from mobile devices. Vertical and square formats naturally command more screen space in the mobile feed than landscape formats.
2. Keep Text Minimal: While LinkedIn has removed strict limits regarding text overlays on images, keeping text concise ensures your message remains legible even on smaller mobile screens.
3. Include a Clear Call-to-Action (CTA): Utilize LinkedIn’s native CTA buttons (