The Complete Guide to LinkedIn Ad Sizes and Specs

Running ads on LinkedIn is one of the most powerful ways to target decision-makers, enterprise buyers, and B2B professionals. However, nothing kills a high-performing campaign budget faster than fuzzy, awkwardly cropped creatives that scream “unprofessional.”

Because LinkedIn serves ads across a mix of desktop interfaces and mobile feeds, nailing your image dimensions, aspect ratios, and file limits is non-negotiable. This guide breaks down the core LinkedIn ad sizes and specifications you need to build crisp, high-converting campaigns.

1. Single Image Ads (Sponsored Content)

Single image ads are the backbone of LinkedIn advertising. They live right in the user’s feed, making format flexibility essential. Depending on your design asset, you can choose from three main aspect ratios: