Done! Now youโre the proud owner of a Telegram channel. The next step is to set up and customize your channel. best-secure-messaging-apps-shutterstock-1892950018.jpg 5Telegram Channel avatar size/dimensions Write your hashtags in the language of your target audience. The optimal dimension of the avatar on Telegram is 512px by 512px, and itโs recommended to use PNG format to deliver an unpixelated avatar.
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