Favicon and webclip max resolution

Yes, I want my webpage to look as nice and sharp as I can. So please, could anyone tell me the max resolution for favicon and Web Clip. It used to be 16x16 icon for favicon and 57x57 jpg/png for Web Clip but with retina devices it may grow up to 32x32 icon and 144x144.
Thanks for your time and suggestions.

Apple’s guidelines suggest 180x180 as the resolution for WebClip icons:


Favicon’s are normally 16x16, but for retina hardware (MacBook Pro w/Retina Display) you’d want them at 32x32.


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Thanks for your fast answer Nik. Great link.