In 2022, the ideal YouTube profile picture (also known as the “channel icon”) size is 800 x 800 pixels.
The optimal size for your YouTube channel art banner image is 2048 x 1152 pixels.
The best size for a YouTube video custom thumbnail photo is 1280 x 720 pixels.
Psst… what does your profile pic say about you?
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Photofeeler tells you how you’re coming across in pics — if you look attractive, smart, trustworthy, fun, confident, and more.
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Screenshot from youtube.com