5Telegram Channel avatar size/dimensions Members can post their voice notes of themselves screaming. Interestingly, the group doesn’t allow to post anything else which might lead to an instant ban. As of now, there are more than 330 members in the group. Done! Now you’re the proud owner of a Telegram channel. The next step is to set up and customize your 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. 3How to create a Telegram channel?
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