Facebook Ad Specs and Dimensions 2026

Getting your Facebook ads rejected — or watching them launch looking cropped, blurry, or broken — is a special kind of frustrating. With so many placements, formats, and ever-changing requirements, even experienced marketers waste hours hunting down the right specs. That ends here. This cheat sheet puts every Facebook ad creative dimension, file size, aspect ratio, and character limit in one clean, scannable reference — so you can spend less time second-guessing and more time launching campaigns that actually convert.

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