Master the Feed: The Definitive Guide to LinkedIn Ad Sizes and Specs

Running B2B campaigns on LinkedIn is an investment. You aren’t just paying for clicks; you are paying for professional intent. Yet, nothing drains a marketing budget faster than a high-intent campaign crippled by sloppy creative execution—blurry images, text chopped off by mobile viewports, or videos rejected because of an unsupported aspect ratio.

Because LinkedIn serves a professional audience across both desktop and mobile devices, nailing your technical dimensions is half the battle. This comprehensive guide breaks down the exact sizing and specifications for every major LinkedIn ad format.

1. Single Image Ads (Sponsored Content)

Single image ads are the backbone of most B2B campaigns. They live directly in the user’s feed and offer three distinct aspect ratio treatments.