Content Font Size: small or x-small?

Which is better?

[zulufox]

I cant decide between small or x-small font size for my content.

Is x-small TOO small?

[hannamyluv]

I would choose neither. One of the biggest complaints about websites is the font is too small. If your gonna make a content site with small font, your asking for it.

[grahamstewart]

I typically use around 80% as my default font.