This article explains linkedin ad sizes & specs guide 2026. Complete LinkedIn ad sizes and specs guide for 2026. Get exact dimensions for Sponsored Content, Message Ads, Carousel, Document, and Video ad formats on LinkedIn.

LinkedIn Advertising

LinkedIn Ad Sizes & Specs Guide 2026

LinkedIn is the premier B2B advertising platform with highly targeted professional audience segments. While e-commerce brands primarily use Meta and TikTok, LinkedIn is valuable for B2B e-commerce, wholesale, and brand partnerships. Getting your ad specs right on LinkedIn ensures your creatives look professional and perform well in the feed. Here are the complete LinkedIn ad specifications for 2026.

Quick Jump: Sponsored Content (Single Image - Landscape) Sponsored Content (Single Image - Square) Sponsored Content (Single Image - Vertical) Sponsored Video Ad Message Ad (Sponsored InMail) Carousel Ad Document Ad Event Ad

All LinkedIn Ad Formats & Sizes

Ad Type Dimensions Aspect Ratio File Types Max Size Notes
Sponsored Content (Single Image - Landscape) 1200 x 628 px 1.91:1 JPG, PNG 5 MB Standard landscape image for the LinkedIn feed. Minimum 400px wide. Headline max 70 characters recommended.
Sponsored Content (Single Image - Square) 1080 x 1080 px 1:1 JPG, PNG 5 MB Square format takes up more feed space. Often outperforms landscape on engagement.
Sponsored Content (Single Image - Vertical) 1080 x 1350 px 4:5 JPG, PNG 5 MB Vertical format for maximum feed real estate on mobile.
Sponsored Video Ad 1920 x 1080 px (landscape) or 1080 x 1080 px (square) 16:9 or 1:1 MP4 200 MB Duration 3 seconds to 30 minutes. Under 15 seconds recommended. Captions strongly recommended.
Message Ad (Sponsored InMail) 300 x 250 px 6:5 JPG, PNG 2 MB Banner image within LinkedIn message ads. Appears on desktop only.
Carousel Ad 1080 x 1080 px 1:1 JPG, PNG 10 MB per card 2-10 cards per carousel. Each card can have unique headline, description, and landing page URL.
Document Ad 1080 x 1080 px (per page recommended) 1:1, 4:5, or 16:9 PDF, DOC, DOCX, PPT, PPTX 100 MB Upload a document as a swipeable ad. Up to 300 pages. Great for carousels, guides, and lead magnets.
Event Ad 1080 x 1080 px (event image) 1:1 JPG, PNG 5 MB Promotes a LinkedIn Event. Image is pulled from the event page. Appears in the feed.

Format Details

Sponsored Content (Single Image - Landscape)

Dimensions 1200 x 628 px
Aspect Ratio 1.91:1
File Types JPG, PNG
Max File Size 5 MB
Notes

Standard landscape image for the LinkedIn feed. Minimum 400px wide. Headline max 70 characters recommended.

Sponsored Content (Single Image - Square)

Dimensions 1080 x 1080 px
Aspect Ratio 1:1
File Types JPG, PNG
Max File Size 5 MB
Notes

Square format takes up more feed space. Often outperforms landscape on engagement.

Sponsored Content (Single Image - Vertical)

Dimensions 1080 x 1350 px
Aspect Ratio 4:5
File Types JPG, PNG
Max File Size 5 MB
Notes

Vertical format for maximum feed real estate on mobile.

Sponsored Video Ad

Dimensions 1920 x 1080 px (landscape) or 1080 x 1080 px (square)
Aspect Ratio 16:9 or 1:1
File Types MP4
Max File Size 200 MB
Notes

Duration 3 seconds to 30 minutes. Under 15 seconds recommended. Captions strongly recommended.

Message Ad (Sponsored InMail)

Dimensions 300 x 250 px
Aspect Ratio 6:5
File Types JPG, PNG
Max File Size 2 MB
Notes

Banner image within LinkedIn message ads. Appears on desktop only.

Carousel Ad

Dimensions 1080 x 1080 px
Aspect Ratio 1:1
File Types JPG, PNG
Max File Size 10 MB per card
Notes

2-10 cards per carousel. Each card can have unique headline, description, and landing page URL.

Document Ad

Dimensions 1080 x 1080 px (per page recommended)
Aspect Ratio 1:1, 4:5, or 16:9
File Types PDF, DOC, DOCX, PPT, PPTX
Max File Size 100 MB
Notes

Upload a document as a swipeable ad. Up to 300 pages. Great for carousels, guides, and lead magnets.

Event Ad

Dimensions 1080 x 1080 px (event image)
Aspect Ratio 1:1
File Types JPG, PNG
Max File Size 5 MB
Notes

Promotes a LinkedIn Event. Image is pulled from the event page. Appears in the feed.

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