LinkedIn Ads Sizes Guide: Dimensions & Specs for 2026

The Ultimate Guide to LinkedIn Ad Sizes and Specs

Running B2B campaigns on LinkedIn requires precision. Unlike more casual social platforms where minor image cropping goes unnoticed, LinkedIn is a professional environment where distorted assets or blurry text instantly undermine your brand’s credibility.

Getting your dimensions right the first time saves you from frustrating re-uploads, wasted ad spend, and awkward text truncations. This comprehensive guide outlines the exact ad sizes, aspect ratios, and file limits you need for every major LinkedIn ad format.

1. Sponsored Content (Feed Ads)

Feed ads are the workhorses of B2B marketing, appearing directly in the professional feeds of your target audience. They come in three primary formats: Single Image, Carousel, and Video.

Single Image Ads

Single image ads are versatile and clean. Choose your layout based on how much screen real estate you want to command on mobile feeds.

• Landscape (1.91:1): 1200 x 628 pixels (Max file size: 5 MB; Formats: JPG, PNG, GIF)
• Square (1:1): 1200 x 1200 pixels (Max file size: 5 MB; Formats: JPG, PNG, GIF)
• Vertical (4:5): 720 x 900 pixels (Max file size: 5 MB; Formats: JPG, PNG, GIF)
• Copy Limits: Introductory text under 150 characters is ideal (hard limit 600); headline under 70 characters.

Carousel Ads

Carousels let you tell a sequential story, display multiple product features, or break down a step-by-step framework.

• Card Image Size: 1080 x 1080 pixels (1:1 aspect ratio)
• Number of Cards: 2 to 10 cards
• Max File Size: 10 MB per card (Formats: JPG, PNG)
• Copy Limits: Card headlines max out at 45 characters.

Video Ads

Video is unmatched for demonstrating software, sharing customer success stories, or introducing thought leadership. LinkedIn supports multiple orientations:

• Square (1:1): 1080 x 1080 pixels (Min 360 x 360, Max 1920 x 1920)
• Vertical (4:5): 1080 x 1350 pixels (Min 360 x 450, Max 1080 x 1350)
• Vertical (9:16): 1080 x 1920 pixels (Min 360 x 640, Max 1080 x 1920)
• Landscape (16:9): 1920 x 1080 pixels (Min 640 x 360, Max 1920 x 1080)
• Technical Specs: MP4 format, file sizes from 75 KB up to 500 MB, and durations ranging from 3 seconds to 30 minutes.

2. Text and Dynamic Ads (Right-Rail Placements)

Though smaller in size, right-rail and dynamic ads offer consistent brand presence across the desktop experience.

Text Ads

Appearing on the top or right side of the desktop feed, Text Ads rely on simplicity.

• Logo Image: 100 x 100 pixels (Square JPG or PNG, max 2 MB)
• Copy Limits: Headline up to 25 characters; description up to 75 characters.

Spotlight Ads

Spotlight ads personalize the experience by pulling the user’s profile image directly into the creative next to your brand logo.

• Company Logo: 100 x 100 pixels (JPG or PNG, max 2 MB)
• Optional Background Image: Exactly 300 x 250 pixels (Max 2 MB)
• Copy Limits: Headline up to 50 characters; description up to 70 characters.

3. Messaging Ads (Conversation & Message Ads)

Direct-to-inbox advertising requires a clean layout and a compelling hook.

• Sender Image: Pulls automatically from the designated sender’s LinkedIn profile.
• Optional Desktop Banner: 300 x 250 pixels (Max 2 MB, JPG or PNG). This banner is displayed exclusively on desktop versions of LinkedIn alongside your message thread.
• Conversation Custom Images (within prompts): 400 x 400 pixels recommended.

Quick Reference Summary Table

| Ad Format | Recommended Dimensions / Aspect Ratio | Max File Size | File Types |
| :— | :— | :— | :— |
| Single Image (Landscape) | 1200 x 628 px (1.91:1) | 5 MB | JPG, PNG, GIF |
| Single Image (Square) | 1200 x 1200 px (1:1) | 5 MB | JPG, PNG, GIF |
| Single Image (Vertical) | 720 x 900 px (4:5) | 5 MB | JPG, PNG, GIF |
| Carousel Cards | 1080 x 1080 px (1:1) | 10 MB per card | JPG, PNG |
| Video Ads | Up to 1920 x 1080 px or 1080 x 1920 px | 500 MB | MP4 |
| Text Ads Logo | 100 x 100 px | 2 MB | JPG, PNG |
| Spotlight Background | 300 x 250 px | 2 MB | JPG, PNG |
| Message / Conversation Banner | 300 x 250 px | 2 MB | JPG, PNG |

Best Practices for LinkedIn Creatives

1. Design for Mobile First: Over 60% of LinkedIn traffic originates from mobile devices. Vertical (4:5) and square (1:1) single-image formats take up significantly more vertical screen space in the mobile feed than landscape ads, yielding higher visibility and interaction rates.
2. Keep Critical Text Centered: Avoid placing important text, logos, or offers near the absolute edges of your creative assets to prevent awkward cropping across different device viewports.
3. Monitor Contrast and Legibility: Professional audiences browse quickly. Ensure your font sizes are large enough to read effortlessly on smaller smartphone screens, and maintain high contrast between your text and background colors.