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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 main design elements of your Telegram channel include a name, bio (brief description), and avatar. Your bio should be: How to Create a Private or Public Channel on Telegram? 6How to manage your Telegram channel? Telegram iOS app: In the “Chats” tab, click the new message icon in the right upper corner. Select “New Channel.”
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