What size should a LinkedIn ad image be?

For Single Image Sponsored Content, LinkedIn recommends 1200 × 1200 px at a 1:1 (square) ratio, which delivers across both desktop and mobile. Horizontal 1.91:1 (1200 × 628) and vertical 4:5 (720 × 900, mobile only) are also supported.

What is the best aspect ratio for LinkedIn ads?

1:1 (square) is the most reliable for feed ads because it renders well on every device. Use 1.91:1 for a classic landscape look, 4:5 or 9:16 for mobile-first vertical video, and 16:9 for landscape video.

What's the maximum file size for a LinkedIn ad?

It varies by format: single image ads max out at 5 MB, carousel cards at 10 MB each, video ads at 500 MB, and document ads at 100 MB. Message and Dynamic ad images are capped at 2 MB.

How many characters can a LinkedIn ad headline be?

Sponsored Content (single image, video, document) headlines allow 70 characters. Carousel cards allow 45 characters each. Spotlight and Follower ad headlines allow 50, and Text ads just 25.

How long can a LinkedIn video ad be?

LinkedIn supports video ads from 3 seconds up to 30 minutes, but short performs best — keep feed videos around 15 seconds or less to hold attention.

How many cards can a LinkedIn carousel ad have?

A carousel ad supports 2 to 10 cards. Each card is 1080 × 1080 px (1:1) and can link to its own destination URL — but once the ad is saved, the cards can't be edited.

Guide · LinkedIn Ads

LinkedIn Ad Specs & Sizes: the 2026 cheat sheet

Every LinkedIn ad format's dimensions, aspect ratios, file types, and character limits, all in one reference. Verified against LinkedIn's official specs, so nobody's guessing in Campaign Manager.

Last updated June 2026 · Sourced from LinkedIn Marketing Solutions documentation

Every format at a glance

The 10-second answer when you're mid-production. Scroll sideways on mobile for the full grid.

Format	Recommended size	Aspect ratio	File type	Max size	Key text limits
Single Image	1200 × 1200 px	1:1 (also 1.91:1, 4:5)	JPG, PNG, GIF	5 MB	Headline 70 · Intro 150
Video	1920×1080 or 1080×1080	16:9, 1:1, 4:5, 9:16	MP4	500 MB	Headline 70 · Intro 150
Carousel	1080 × 1080 per card	1:1	JPG, PNG	10 MB/card	Headline 45/card · Intro 150
Document	Standard pages (A4, Letter)	Vertical / square	PDF, DOC(X), PPT(X)	100 MB	Headline 70 · Intro 150
Conversation	300 × 250 banner	N/A	JPG, PNG	2 MB	Message up to 8,000 · 5 CTAs/msg
Message	300 × 250 banner	N/A	JPG, PNG, GIF	2 MB	Subject 60 · Body 1,500 · CTA 20
Spotlight (Dynamic)	100 × 100 logo	1:1	JPG, PNG	2 MB	Headline 50 · Desc 70 · CTA 18
Follower (Dynamic)	100 × 100 logo	1:1	JPG, PNG	2 MB	Headline 50 · Desc 70
Text	100 × 100	1:1	JPG, PNG	2 MB	Headline 25 · Desc 75
Event	1200 × 628 (auto)	1.91:1	Auto from event	N/A	Intro 600

Aspect ratios at a glance

The shapes you'll actually export, drawn to scale. Tap a size to copy it.

1:1

Square · feed

1.91:1

Landscape · feed

4:5

Vertical · mobile

9:16

Vertical · video

16:9

Landscape · video

Get the specs right

Four rules that save wasted spend and rejected uploads.

Default to 1:1 (1200×1200)

Square delivers cleanly on both desktop and mobile across Sponsored Content. It's the safest single-asset standard.

Design mobile-first

Most impressions are on mobile. Keep text legible and CTAs visible without relying on desktop real estate.

Mind the recommended limits

Stay under recommended text counts, not just the max. Intro text truncates around 150 characters on many devices.

Re-check before every launch

LinkedIn tweaks specs quietly. A UI change can start cropping a creative that worked fine last quarter.

Specs by format

The full detail behind every format in the table above.

Single Image Ads

Native Sponsored Content in the feed, across desktop and mobile.

File: JPG, PNG, GIF · max 5 MB
Horizontal: 1.91:1 → 1200×628 (min 640×360)
Square: 1:1 → 1200×1200 (recommended)
Vertical: 4:5 → 720×900 (mobile only)
Text: Headline 70 · Intro 150 · Ad name 255

Video Ads

Native video for awareness through to conversion.

File: MP4 · 75 KB–500 MB · 30 fps
Length: 3 sec – 30 min
Ratios: 4:5, 9:16, 16:9, 1:1 (360–1920 px)
Text: Headline 70 (max 200) · Intro 150 (max 600)
Thumbnail: JPG/PNG ≤ 2 MB

Carousel Ads

A swipeable 2–10 card series in a single feed unit.

Cards: 2–10
Card size: 1080×1080 (1:1)
File: JPG, PNG, non-animated GIF · 10 MB/card
Text: Headline 45/card · Intro 150 (max 255)
Note: Cards can't be edited once saved

Document Ads

Share a PDF or deck in the feed, ideal for lead gen.

File: PDF, DOC, DOCX, PPT, PPTX · max 100 MB
Pages: Under 10 recommended (300 max)
Layouts: Standard (Letter, A4, etc.)
Text: Headline 70 · Intro 150
Note: Flatten multi-layer PDFs · no URL

Conversation Ads

Multi-CTA interactive messages in LinkedIn Messaging.

Banner: 300×250 ≤ 2 MB (desktop, optional)
Sender img: 250×250
Message: Up to 8,000 chars (<500 recommended)
CTAs: 5 per message · 50 per conversation
Note: A 'Not Interested' CTA is required

Message Ads

A single sponsored message delivered to the inbox.

Subject: 60 chars
Body: 1,500 chars · up to 10 emojis
CTA: Button 20 · up to 3 links
Banner: 300×250 ≤ 2 MB JPG/PNG/GIF (desktop)
Footer: Custom T&C up to 20,000 chars

Spotlight Ads

Personalized desktop Dynamic Ads using profile data.

Logo: Min 100×100 (JPG/PNG)
Text: Headline 50 · Description 70 · Company 25
CTA: 18 chars · URL ≤ 500
Background: Optional, exactly 300×250 ≤ 2 MB

Follower Ads

Personalized Dynamic Ads that promote your Page.

Logo: 100×100
Text: Headline 50 · Description 70

Text & Event Ads

Simple desktop PPC units, and feed ads for events.

Text ad: 100×100 image · Headline 25 · Desc 75
Event ad: Creative auto-pulled (1200×628)
Event text: Intro 600

LinkedIn ad specs FAQ

: For Single Image Sponsored Content, LinkedIn recommends 1200 × 1200 px at a 1:1 (square) ratio, which delivers across both desktop and mobile. Horizontal 1.91:1 (1200 × 628) and vertical 4:5 (720 × 900, mobile only) are also supported.

Sources

All specs verified against LinkedIn's official documentation.

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