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. Add the logo from your device. Adjust the visible area of your image. Congratulations! Now your Telegram channel has a face Click “Save”.! Read now 5Telegram Channel avatar size/dimensions A new window will come up. Enter your channel name and bio. (See the character limits above.) Click “Create.”
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