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 SUCK Channel on Telegram, with a message saying some content has been removed by the police. Photo: Telegram screenshot. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your channel. Administrators 5Telegram Channel avatar size/dimensions
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