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. Administrators The Channel name and bio must be no more than 255 characters long 1What is Telegram Channels? Public channels are public to the internet, regardless of whether or not they are subscribed. A public channel is displayed in search results and has a short address (link).
from us
