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. 1What is Telegram Channels? The Channel name and bio must be no more than 255 characters long A Hong Kong protester with a petrol bomb. File photo: Dylan Hollingsworth/HKFP. The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be:
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