YouTube community posts are great way to engage with your audience. YouTube channels with at least 1000 subscribers has this feature available. To make highly engaging posts it necessary to know the perfect YouTube community post size. So according to google the best size for YouTube community post is 1080×1080 pixels.
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YouTube allows to publish the following formats in “YouTube community” tab; Text posts, playlist posts, image post, gif post and polls post.
YouTube Community Post Size For Images and GIF Posts
Community Post Size: 1080×1080 pixels Aspect ratio: 1:1 Size: Up to 16MB
File types: JPG, PNG, GIF, or WEBP
The perfect size for YouTube community post is 1080×1080 pixels but can also be 360×360 pixels, 480×480 pixels. But should always have 1:1 aspect ratio which is a square image.