Why is my YouTube banner blurry on mobile? Correct size for 2025?

[Alazhe]

I’m redesigning my channel and noticed my banner loses quality or gets cropped on mobile. What’s the proper dimension I should use to avoid this issue in 2025?

 

[steaky]

I’m redesigning my channel and noticed my banner loses quality or gets cropped on mobile. What’s the proper dimension I should use to avoid this issue in 2025?

google