5Telegram Channel avatar size/dimensions 2How to set up a Telegram channel? (A step-by-step tutorial) 6How to manage your Telegram channel? 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 new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.”
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