5Telegram Channel avatar size/dimensions How to Create a Private or Public Channel on Telegram? 6How to manage your Telegram channel? The optimal dimension of the avatar on Telegram is 512px by 512px, and it’s recommended to use PNG format to deliver an unpixelated avatar. In handing down the sentence yesterday, deputy judge Peter Hui Shiu-keung of the district court said that even if Ng did not post the messages, he cannot shirk responsibility as the owner and administrator of such a big group for allowing these messages that incite illegal behaviors to exist.
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