LinkedIn Ads Sizes Guide: Dimensions & Specs for 2026

Choosing the right dimensions for your LinkedIn advertisements is essential for making a professional impression and ensuring your visuals don’t get awkwardly cropped or pixelated. Because LinkedIn is a professional network utilized by decision-makers, recruiters, and B2B marketers, maintaining high visual standards directly impacts your brand credibility.

Here is a complete guide to LinkedIn ad sizes across the platform’s most popular formats.

Single Image Ads

Single image ads appear directly in the target audience’s LinkedIn feed. They are versatile, easy to produce, and effective for brand awareness, event promotion, or driving traffic to a landing page.

• Landscape: 1200 x 627 pixels (1.91:1 aspect ratio)
• Square: 1200 x 1200 pixels (1:1 aspect ratio)
• Vertical: 600 x 900 pixels (2:3 aspect ratio)
• File Types: JPG or PNG
• Maximum File Size: 5 MB

Carousel Image Ads

Carousel ads allow you to showcase multiple images in a swipeable sequence. This format is ideal for telling a brand story, highlighting a range of products, or breaking down a step-by-step process.

• Image Size: 1080 x 1080 pixels (1:1 aspect ratio)
• File Types: JPG or PNG
• Maximum File Size: 10 MB per card
• Card Count: 2 to 10 cards per ad

Video Ads

Video content is a powerful way to capture attention as professionals scroll through their feeds. LinkedIn supports a variety of video dimensions depending on whether you want a cinematic widescreen look or a mobile-optimized vertical display.

• Landscape: 1200 x 675 pixels (16:9 aspect ratio)
• Square: 1080 x 1080 pixels (1:1 aspect ratio)
• Vertical: 1080 x 1350 pixels (4:5 aspect ratio) or 720 x 1280 pixels (9:16 aspect ratio)
• File Types: MP4
• Duration: 3 seconds to 30 minutes (though 15 to 30 seconds typically performs best for engagement)
• Maximum File Size: 200 MB

Thought Leader Ads

Thought Leader Ads allow you to sponsor organic posts published by your company’s employees or executives. Because they rely on existing organic posts, the media sizes follow standard LinkedIn post specifications:

• Images: 1200 x 627 pixels (Landscape) or 1200 x 1200 pixels (Square)
• Videos: Standard landscape (16:9) or vertical video specs apply depending on the original post.

Text and Sponsored Messaging Ads

If you are running text-based campaigns or direct message ads, imagery requirements are smaller and more specific:

• Text Ad Logo Size: 100 x 100 pixels (Square, JPG or PNG, max 2 MB)
• Message Ad Custom Banner (Desktop only): 300 x 250 pixels (JPG or PNG, max 40 KB)

Best Practices for LinkedIn Creatives

• Design for Mobile First: Over 60% of LinkedIn traffic originates from mobile devices. Using square (1:1) or vertical formats ensures your ads occupy more screen space in the mobile feed.
• Keep Text Minimal: Avoid cluttering your images with heavy paragraphs of text. Let your primary ad copy and headline do the heavy lifting while the image grabs attention.
• Include a Clear Call-to-Action (CTA): Utilize LinkedIn’s built-in CTA buttons (such as “Register,” “Download,” or “Learn More”) and ensure your landing page matches the promise of your ad.