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: Telegram Android app: Open the chats list, click the menu icon and select “New Channel.” Channel login must contain 5-32 characters How to Create a Private or Public Channel on Telegram?
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