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Needing to know what the YouTube Thumbnail Dimension size and guidelines are? Look no further! We have the answer.  You should optimize your YouTube thumbnails by using dimensions: 1280 pixels wide by 720 pixels tall, with a minimum width of 640 pixels. A ratio of 16:9 is best recommended.

YouTube Thumbnail Size

Building & Branding Websites that Get Results

The world's fastest and most SEO friendly website code.