How to create a business channel on Telegram? (Tutorial) 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. A vandalised bank during the 2019 protest. File photo: May James/HKFP. The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: Activate up to 20 bots
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