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The Channel name and bio must be no more than 255 characters long How to Create a Private or Public Channel on Telegram? 5Telegram Channel avatar size/dimensions The main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: 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.
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