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. Select “New Channel” "Doxxing content is forbidden on Telegram and our moderators routinely remove such content from around the world," said a spokesman for the messaging app, Remi Vaughn. Your posting frequency depends on the topic of your channel. If you have a news channel, it’s OK to publish new content every day (or even every hour). For other industries, stick with 2-3 large posts a week. Invite up to 200 users from your contacts to join your channel
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