Guide to LinkedIn Ad Sizes

LinkedIn is a powerful platform for B2B marketing, offering businesses the opportunity to reach professionals, decision-makers, and industry leaders. To maximize engagement and conversions, it’s crucial to use the right LinkedIn ad sizes for your campaigns.

1. LinkedIn Sponsored Content Ad Sizes

Sponsored Content appears directly in users’ feeds and can include images, videos, or carousels.

Single Image Ads

• Recommended size: 1200 x 627 pixels (1.91:1 aspect ratio)

• Minimum size: 200 x 200 pixels

• File type: JPG or PNG (max 10MB)

• Text length: Keep headlines under 150 characters and descriptions under 70 characters for best visibility.

Carousel Ads

• Image size: 1080 x 1080 pixels (1:1 square)

• Minimum: 100 x 100 pixels

• File type: JPG or PNG (max 10MB per image)

• Number of cards: 2-10

• Text length: Headline (45 characters max), Description (160 characters max)

Video Ads

• Recommended resolution: 1280 x 720 pixels (16:9 landscape) or 720 x 1280 (9:16 vertical)

• Minimum resolution: 360p

• Max file size: 200MB

• Duration: 3 seconds to 30 minutes (best-performing videos are 15-30 seconds)

• Supported formats: MP4, MOV

• Thumbnail size: 1200 x 627 pixels

2. LinkedIn Message Ads (Sponsored InMail) Sizes

These ads appear as direct messages in users’ LinkedIn inboxes.

• Character limit: Subject line (60 characters), Body copy (500 characters)

• Image size (optional): 300 x 250 pixels

• CTA button: Customizable (e.g., “Download Now,” “Learn More”)

3. LinkedIn Text Ads Sizes

Text ads appear on the right rail or top of the LinkedIn feed on desktop.

• Image size: 300 x 250 pixels

• Headline: 25 characters max

• Description: 75 characters max

• Business name: 25 characters max

4. LinkedIn Dynamic Ads Sizes

Dynamic ads personalize content based on user data (e.g., profile picture, job title).

Follower Ad

• Logo size: 100 x 100 pixels

• Background image (optional): 300 x 250 pixels

Spotlight Ad

• Logo size: 100 x 100 pixels

• Background image (optional): 300 x 250 pixels

Content Ad

• Image size: 1200 x 627 pixels

5. LinkedIn Lead Gen Forms Ad Sizes

Lead gen forms auto-fill user data for higher conversions.

• Image size: 300 x 250 pixels (for right rail ads) or 1200 x 627 pixels (for Sponsored Content)

• Form fields: Customizable (name, email, company, job title, etc.)

Best Practices for LinkedIn Ads

✅ Use high-quality visuals – Blurry or pixelated images reduce credibility.
✅ Optimize for mobile – Over 60% of LinkedIn traffic comes from mobile devices.
✅ Keep text concise – Shorter headlines and descriptions perform better.
✅ Test different formats – Experiment with carousels, videos, and single images.
✅ Follow LinkedIn’s ad policies – Avoid misleading claims or prohibited content.

Using the correct LinkedIn ad sizes ensures your campaigns look professional and perform well. Whether you’re running Sponsored Content, Message Ads, or Dynamic Ads, adhering to LinkedIn’s specifications will help maximize engagement and ROI.