What's the best image size for LinkedIn ads?

Square, 1200 × 1200 pixels (1:1). LinkedIn recommends it for desktop and mobile. On mobile, a 4:5 vertical image (720 × 900) takes up more of the screen.

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

5 MB for single image ads and 10 MB for each carousel card. The optional Conversation ad banner is limited to 2 MB.

Which file types does LinkedIn accept?

JPG and PNG for every image ad (single image ads also accept GIF). AdTechKit exports JPG or PNG, compressed to fit each limit.

LinkedIn ad sizes. Every image size, checked.

Every LinkedIn image ad size: single image ads in landscape, square and vertical, carousel cards and the Conversation ad banner, with file limits and text lengths from LinkedIn's own specifications.

Not sure which to use? LinkedIn recommends square (1:1, 1200 × 1200) for both desktop and mobile. Add a 4:5 vertical (720 × 900) for more space on mobile.

Every LinkedIn image ad size

Placement	Size (px)	Shape	Largest file	In AdTechKit
Landscape image	1200 × 628	1.91:1	5 MB	Free
Square image	1200 × 1200	1:1	5 MB	Free
Vertical 4:5 image	720 × 900	4:5	5 MB	Pro
Vertical 2:3 image	600 × 900	2:3	5 MB	Pro
Tall vertical image	628 × 1200	1:1.91	5 MB	Pro
Carousel	1080 × 1080	1:1	10 MB	Pro
Conversation ad banner	300 × 250	6:5	2 MB	Pro

Make your ad in every size

The 4 main feed sizes are free; every size is included in Pro and up.

How long the words can be

Recommended lengths, so nothing is cut off. The AI copy writer keeps to them for you.

Text	Up to	Good to know
Introductory text	150 characters	Longer text is cut off with "…see more" on some devices.
Headline	70 characters	Shown under the image.
Description	100 characters	Only shown on the LinkedIn Audience Network.

Checked against the platform's own specifications on 1 October 2026: LinkedIn: Single image ads advertising specifications · LinkedIn: Carousel ads advertising specifications · LinkedIn: Message ads advertising specifications. Platforms change their specs from time to time, so check before a big launch.

Common questions

What's the best image size for LinkedIn ads?: Square, 1200 × 1200 pixels (1:1). LinkedIn recommends it for desktop and mobile. On mobile, a 4:5 vertical image (720 × 900) takes up more of the screen.
What's the maximum file size for a LinkedIn image ad?: 5 MB for single image ads and 10 MB for each carousel card. The optional Conversation ad banner is limited to 2 MB.
Which file types does LinkedIn accept?: JPG and PNG for every image ad (single image ads also accept GIF). AdTechKit exports JPG or PNG, compressed to fit each limit.