The Ultimate Guide to LinkedIn Ad Sizes and Dimensions

Navigating LinkedIn advertising can feel like high-stakes B2B chess. You have targeted the exact decision-makers, crafted a compelling value proposition, and optimized your budget. But if your creative asset is blurry, cropped awkwardly, or rejected due to incorrect dimensions, your campaign stalls before it even starts.

Getting your creative specifications right is foundational to driving high click-through rates (CTR) and protecting your brand reputation. This comprehensive guide breaks down the essential dimensions, aspect ratios, and design best practices for LinkedIn’s most popular ad formats.

Why LinkedIn Ad Dimensions Matter

Unlike B2C platforms where users endlessly swipe through fast-moving visual feeds, LinkedIn is a professional ecosystem. Users expect clarity, authority, and polish. Using exact specifications ensures:

• No Awkward Cropping: LinkedIn’s dynamic feed automatically handles mobile and desktop views differently. Correct dimensions keep your core messaging and call-to-action (CTA) fully visible.
• Maximized Screen Real Estate: Vertical and square formats take up more physical space on mobile screens, significantly boosting visibility and engagement compared to traditional horizontal banner sizes.
• Faster Approval Times: Submitting assets that meet native platform requirements prevents automatic ad rejections and campaign delays.

1. Single Image Ads (Sponsored Content)

Single image ads are the bread and butter of LinkedIn lead generation. They blend seamlessly into the feed while giving you direct control over your primary visual hook.

• Landscape (1.91:1):
  • Recommended Size: 1200 x 627 pixels
  • Best for: Traditional web banners, landscape photography, or broad graphic layouts.
• Square (1:1):
  • Recommended Size: 1200 x 1200 pixels
  • Best for: Balanced infographics, product close-ups, and punchy value statements.
• Vertical / Portrait (4:5):
  • Recommended Size: 1080 x 1350 pixels
  • Best for: Mobile-first dominance, capturing maximum vertical space on smartphone feeds.

File Specs: Maximum file size is 55 MB, accepted formats include JPG, PNG, and non-animated GIF.

2. Carousel Image Ads

Carousels allow you to tell a sequential story, display multiple products, or showcase a step-by-step process. Each card can feature its own unique destination URL or lead form.

• Recommended Size: 1080 x 1080 pixels (Square, 1:1 aspect ratio)
• Card Count: Minimum of 2 cards, maximum of 10 cards.
• File Specs: Max file size of 10 MB per card; formats include JPG, PNG, and non-animated GIFs.

3. Video Ads

Video is one of the most effective ways to build brand trust and explain complex enterprise software or services.

• Landscape (16:9): 1920 x 1080 or 1280 x 720 pixels
• Square (1:1): 1080 x 1080 pixels
• Vertical (9:16 or 4:5): Recommended for mobile feeds (