The Ultimate Guide to LinkedIn Ad Sizes & Specs

When you are investing time and budget into B2B marketing, the last thing you want is a campaign rejected—or worse, quietly underperforming—because of a pixel error or a awkwardly cropped asset. LinkedIn is a professional ecosystem where presentation matters. If your creative looks blurry, stretched, or cut off, users will scroll right past it.

To help you get it right the first time, this breakdown covers the essential dimensions, aspect ratios, and file requirements for LinkedIn’s most popular ad formats.

1. Single Image Ads (Sponsored Content)

Single image ads are the backbone of LinkedIn advertising. They appear directly in the user’s feed, making versatility a must.

• Landscape (1.91:1):
  • Recommended: 1200 x 627 pixels
• Square (1:1):
  • Recommended: 1200 x 1200 pixels
• Vertical (4:5):
  • Recommended: 720 x 900 pixels (or up to 1200 x 1500 pixels)
• File Types: JPG, PNG, or GIF (static only)
• Max File Size: 5 MB

Pro Tip: While landscape is the traditional choice, Square (1:1) and Vertical (4:5) take up much more valuable real estate on mobile feeds, which often translates to higher engagement rates.

2. Carousel Image Ads

Carousels let you tell a visual story, showcase a product suite, or present step-by-step insights across multiple swipeable cards.

• Card Dimensions: 1080 x 1080 pixels (1:1 aspect ratio)
• Card Count: 2 to 10 cards per carousel
• File Types: JPG or PNG
• Max File Size: 10 MB per card
• Copy Limits: Headlines max out at 45 characters; introductory text maxes out at 255 characters.

3. Video Ads

Video is a powerful tool for building brand awareness and deep-diving into complex B2B solutions. LinkedIn supports a wide range of shapes.