Telegram Channels requirements & features 5Telegram Channel avatar size/dimensions 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. The imprisonment came as Telegram said it was "surprised" by claims that privacy commissioner Ada Chung Lai-ling is seeking to block the messaging app due to doxxing content targeting police and politicians. 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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