What matters
YouTube Profile Photo dimensions at a glance
Channel avatars appear as small circles everywhere on YouTube — comments, subscriptions, search results. A square 800×800 source keeps the composition centered for circular crops.
Profile images appear next to every comment and in subscriber lists. A centered, high-contrast avatar helps instant brand recognition.
Edge-heavy artwork gets clipped into a circle. Low-resolution exports look blurred when YouTube scales them for different surfaces.