The Complete Guide to LinkedIn Ad Sizes and Specs

Running high-performing campaigns on LinkedIn requires more than just a strong value proposition and precise audience targeting—it demands technical precision. Upload an image that is slightly off-ratio or a video that breaks file size limits, and you risk distorted crops, sluggish performance, or outright rejection by LinkedIn’s review system.

To help your creative and media teams build assets that look pristine on every screen, this guide breaks down the core dimensions, file formats, and technical specifications for every major LinkedIn ad format.

1. Single Image Ads

Single image ads appear natively in the LinkedIn feed, making them a versatile choice for brand awareness, lead generation, and content promotion.

• Landscape (1.91:1): 1200 × 628 pixels (Appears on desktop and mobile)
• Square (1:1): 1200 × 1200 pixels (Appears on desktop and mobile)
• Vertical (4:5): 720 × 900 pixels (Mobile only; highly recommended for capturing feed real estate)
• File Types: JPG, PNG, or non-animated GIF
• Max File Size: 5 MB

2. Carousel Image Ads

Carousel ads let you showcase a sequence of 2 to 10 swipeable cards, making them ideal for step-by-step guides, product feature breakdowns, or storytelling.

• Card Aspect Ratio: 1:1 square
• Recommended Resolution: 1080 × 1080 pixels per card
• File Types: JPG, PNG, or non-animated GIF
• Max File Size: 10 MB per card
• Card Limits: 2 to 10 cards maximum

3. Video Ads

Video is one of the most engaging ways to grab attention in a professional feed. LinkedIn supports multiple aspect ratios depending on whether your video is cinematic, square, or optimized for mobile vertical scrolling.

• Landscape (16:9): 1920 × 1080 pixels
• Square (1:1): Up to 1920 × 1920 pixels
• Vertical (4:5): 720 × 900 pixels recommended (Min 360 × 450, Max 1080 × 1350)
• Vertical (9:16): Up to 1080 × 1920 pixels
• File Format: MP4
• File Size Range: 75 KB to 500 MB
• Duration: 3 seconds to 30 minutes (though concise, value-driven videos typically see higher completion rates)

4. Text Ads

Appearing neatly on the desktop right rail, Text Ads are budget-friendly, text-and-logo units that operate on a PPC or PPM bidding model.

• Logo Dimensions: 100 × 100 pixels
• File Types: JPG or PNG
• Max File Size: 2 MB
• Copy Constraints: Headline up to 25 characters; description up to 75 characters

5. Spotlight & Follower Ads (Dynamic Ads)

Dynamic ads personalize themselves using the target user’s profile data (such as their profile photo, first name, or job title) to drive page follows or website traffic.

• Company Logo/Image: 100 × 100 pixels (JPG or PNG, max 2 MB)
• Spotlight Background Image (Optional): 300 × 250 pixels (JPG or PNG, max 2 MB)
• Copy Constraints: Headline up to 50 characters; description up to 70 characters

6. Document Ads

Document ads allow users to read whitepapers, research reports, or pitch decks directly inside the LinkedIn feed without navigating to an external landing page.

• Supported File Types: PDF, PPT, PPTX, DOC, or DOCX
• Max File Size: 100 MB
• Page Limit: Up to 300 pages

7. Message & Conversation Ads

Delivered straight to a user’s LinkedIn Messaging inbox, these formats drive high-intent, direct interactions.

• Desktop Banner (Optional): 300 × 250 pixels (JPG or PNG, max 2 MB) — Note: Visible on desktop views only.
• Custom Image within Message Flow (Optional): 400 × 400 pixels recommended
• Sender Image: Pulls directly from the designated sender’s personal LinkedIn profile.

Quick-Reference Summary Table

| Ad Format | Recommended Dimensions / Specs | Max File Size | File Formats |
| :— | :— | :— | :— |
| Single Image (Square) | 1200 × 1200 px | 5 MB | JPG, PNG, GIF |
| Single Image (Landscape)| 1200 × 628 px | 5 MB | JPG, PNG, GIF |
| Single Image (Vertical) | 720 × 900 px | 5 MB | JPG, PNG, GIF |
| Carousel Card | 1080 × 1080 px | 10 MB per card | JPG, PNG, GIF |
| Video Ad | 1920 × 1080 px (16:9) / 1080 × 1920 px (9:16) | 500 MB | MP4 |
| Text Ad Logo | 100 × 100 px | 2 MB | JPG, PNG |
| Spotlight Ad Background| 300 × 250 px | 2 MB | JPG, PNG |
| Document Ad | N/A (PDF/PPT/DOC) | 100 MB | PDF, PPT, DOC |

Pro-Tips for Production Success

• Design for Mobile First: Over 60% of LinkedIn traffic originates from mobile devices. Prioritize square (1:1) or vertical (4:5) dimensions for single-image and video ads to occupy maximum feed space.
• Keep Text Out of the Danger Zones: Avoid placing critical logos, text, or faces near the very edges of your creative assets, where platform UI elements (like video duration stamps or sponsored labels) might clip them.
• Double-Check Compression: Always export your static graphics at crisp resolutions. While LinkedIn allows larger files up to specific caps, clean vector exports ensure your brand looks sharp to enterprise decision-makers.