Think of another way pixels are used: width of divs, When we talk about “Fixed width”, we tend to refer to width that are set in pixels. That is, it doesn’t matter how much you increase font size through your browser interface, the size of the container remains the same. 500px wide will be 500px wide, unless you change your monitor’s resolution.

I haven’t run those tests in a while, but it used to be that if you set a font size in px, some browsers would not resize them.

So you think ‘px’ does not help people with disabilities as much as ‘em’ or ‘%’ . Right ?

I will have it in mind when doing future projects.

The thing is, px *is* relative, but relative from one machine to another. That is, on one monitor, a pixel will always have the same size.

In terms of accessibility, the “relativity” of a pixel is rather useless. In other words, that unit of measure should not really be considered relative for the purpose of accessibility.

Again, for the purpose of accessibility, font sizes should be declared in EM or %.

I’m glad people are talking about these issues, thanks for bringing it up