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. Channel login must contain 5-32 characters Earlier, crypto enthusiasts had created a self-described “meme app” dubbed “gm” app wherein users would greet each other with “gm” or “good morning” messages. However, in September 2021, the gm app was down after a hacker reportedly gained access to the user data. Joined by Telegram's representative in Brazil, Alan Campos, Perekopsky noted the platform was unable to cater to some of the TSE requests due to the company's operational setup. But Perekopsky added that these requests could be studied for future implementation. 5Telegram Channel avatar size/dimensions
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