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. It’s easy to create a Telegram channel via desktop app or mobile app (for Android and iOS): 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? Each account can create up to 10 public channels
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