Guide · LinkedIn Ads
LinkedIn Single Image Ads
The workhorse of B2B advertising. One image, one headline, one block of copy, running natively across the feed. The exact specs, the character limits, and the creative patterns that separate a scroll-past from a click.
Last verified June 2026 against LinkedIn's Help Center
The short answer
Single image ads are the most common format on LinkedIn, and for most B2B teams they are the right place to start. One asset runs across the feed on both desktop and mobile, they are far cheaper to produce than video, and they generate clean, comparable engagement signals that make testing predictable.
But spec compliance and spec optimization are two different things. A 1200x628 JPG passes the upload validator. A 1200x1200 image with a clean hierarchy and a 68-character headline tends to win more of the auction, because of how the feed renders on mobile and how LinkedIn weighs engagement. This guide covers both: the numbers you need to ship, and the choices that decide whether the ad performs. For every format's dimensions in one place, see the full ad specs guide.
Single image ads at a glance
The quick orientation before the spec tables: what the format is, where it runs, and what it is best at.
| Attribute | Detail |
|---|---|
| Format family | Sponsored Content, appears natively in the feed |
| Placement | Desktop and mobile feed, plus LinkedIn Audience Network |
| Components | One image, intro text, headline, optional description, CTA button |
| Objectives | Awareness, consideration, and conversion |
| Ad sets | Supported by both Classic and Accelerate ad sets |
| Best for | Mid-funnel education and bottom-funnel conversion, fast message testing |
Image specs
Accepted file types are JPG, PNG, and GIF (animated GIFs up to 250 frames), max 5 MB. Images under 401 px wide display as a thumbnail. Vertical now recommends 4:5; the older 1:1.91 still works but adds side borders.
| Orientation | Aspect ratio | Recommended | Min / Max | Delivery |
|---|---|---|---|---|
| Square (recommended) | 1:1 | 1200 x 1200 px | 360x360 / 4320x4320 | Desktop + mobile |
| Horizontal / landscape | 1.91:1 | 1200 x 628 px | 640x360 / 7680x4320 | Desktop + mobile |
| Vertical | 4:5 | 720 x 900 px | 360x640 / 2430x4320 | Mobile only |
Build square by default
If you build one creative, build it square (1:1, 1200x1200). It delivers across both desktop and mobile and occupies the most vertical feed space on mobile, which means more scroll-stop opportunity before copy or offer even enter the picture.
You can crop a square down to horizontal later. You cannot crop horizontal up to square without losing content or adding white space. Vertical only serves on mobile, so leading with it quietly costs you desktop reach.
Text and character limits
Keep intro text under 150 characters. LinkedIn truncates past that with a \u201csee more\u201d link, and every click on it is a charged click, so you end up paying for curiosity instead of intent. CTAs are chosen from a preset list (Learn More, Sign Up, Register, Download, Request Demo, and more); there is no free-text CTA.
| Field | Max characters | Recommended | Notes |
|---|---|---|---|
| Ad name (optional) | 255 | n/a | Internal only, not shown to members |
| Introductory text | 3,000 | 150 or fewer | Truncates with “see more” above ~150 chars |
| Headline | 200 | 70 or fewer | Truncates above 70 on most placements |
| Description (LAN) | 300 | 100 or fewer | Shows on Audience Network or sub-200px images |
| Destination URL | 2,000 | n/a | http:// or https:// prefix required |
Creative best practices
It is impossible for one creative to follow every practice at once. Most strong ads hit three or four. Treat these as defaults to follow most of the time, then test outside them to learn what your ICP actually responds to.
Use high-contrast, uncluttered images
- The LinkedIn feed is muted and white, so bright, high-contrast visuals stand out.
- A colored background or border gives the ad separation from the feed.
Keep text overlays minimal
- Keep any copy on the image under roughly 20 to 25% of the area.
- Make it short, bold, and legible on mobile without zooming.
Lead with a specific number
- “Cut LinkedIn CPL by 34%” beats “improve your ad performance”.
- B2B audiences filter generic claims. Specific numbers pass the filter.
Use social proof and stats
- “Trusted by 1,000+ teams” or a named quote builds credibility fast.
- Recognizable customer logos work in a single glance.
Test people vs product visuals
- Real faces, not stock, tend to win awareness and consideration.
- Product UI, dashboards, and diagrams win mid-funnel “how it works” intent.
Keep brand placement subtle
- Include your logo, but let the ad feel like content, not a banner.
- Top performers rarely lead with a giant logo lockup.
Give the creative whitespace
- Ads with breathing room consistently outperform crowded visuals.
- Resist the urge to fill every pixel.
Match the CTA, test past “Learn More”
- “See how it works” or “Get the full report” set clearer expectations.
- A specific CTA often lifts click quality over a generic one.
Test short looping GIFs
- A 3 to 10 second GIF with subtle motion grabs attention on one message.
- The whole creative stays clickable, unlike video where only the CTA is.
Performance benchmarks
Single image ads have the second-highest CTR of the traditional formats, behind only thought leader ads, and they beat both carousel and video on cost per click. The bigger story is the spread: median CTR is 0.42%, but disciplined creatives regularly clear 1% and the best break 2%.
| Metric | Single image | Thought leader | Carousel | Video |
|---|---|---|---|---|
| Median CTR | 0.42% | 2.68% | 0.32% | 0.24% |
| Median CPC | $13.23 | $2.29 | $13.30 | $15.61 |
How to set one up
Six steps from a fresh campaign to a clean, testable single image ad.
- 1
Pick the objective first
Your objective controls the available optimization goals, bids, and whether you use a destination URL or a Lead Gen Form. Start from the goal, not the creative.
- 2
Build the creative square
Export a 1200 x 1200 image, PNG if it has text or graphics, JPG if it is photographic. Keep it under 2 MB for faster loading.
- 3
Write to the limits
Land the hook in the first 150 characters of intro text, keep the headline at 70 or fewer, and pick a CTA that matches the offer.
- 4
Add alt text
It is optional but quick, and it makes the ad accessible to members using screen readers without changing what everyone else sees.
- 5
Launch 2 to 4 variants
Change one variable at a time during the learning phase, image, headline, or offer, so the test stays clean and readable.
- 6
Prune on data
Retire any ad that underperforms once it passes 1,000 impressions, and refresh creative regularly. Ad fatigue hits narrow ABM audiences fast.
LinkedIn single image ads FAQ
- Square at 1200 x 1200 pixels (1:1) is the recommended default because it serves on both desktop and mobile and takes up the most feed space. Horizontal 1200 x 628 (1.91:1) also works across both. Vertical 4:5 serves on mobile only.
Sources
All specs verified against LinkedIn's official documentation.
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