A common cause of blurry profile shots is the original size. If you upload a tiny photo, Twitter will stretch it to fit the display size, resulting in the picture appearing blurry.

NBA fans roast LeBron James for blurry new profile picture on X Of course, one of the funniest reactions was @SplashBrosMuse informing James that a better version of the same photo was right there ...

You're also likely to use a colourful profile picture which is blurry and "low in sharpness". This relatively badly-taken picture will probably show you grinning, laughing or generally playing nice.