The Complete Masterclass to LinkedIn Ad Sizes and Specs

There is nothing quite as frustrating as finishing a brilliant piece of B2B creative, uploading it to Campaign Manager, and watching LinkedIn crop out your core message, stretch your product screenshot, or reject the file entirely because of a few rogue pixels.

On LinkedIn, where your audience consists of decision-makers, executives, and professionals scrolling through high-stakes feeds, sloppy formatting instantly kills credibility. Precision matters.

This guide breaks down everything you need to know about LinkedIn ad sizes, aspect ratios, file limits, and character constraints, organized format by format so your campaigns always look sharp and perform at their peak.

1. Single Image Ads (Sponsored Content)

Single image ads are the backbone of most B2B campaigns. They sit directly in the user feed, making crisp formatting vital to stop the scroll. You have three primary aspect ratio options depending on your strategy: