Px is fine, the only problem is that IE (wrongly) won't let it resize. For print, you could go with points (pt) if you wanted.

Personally, I use % and em because thats a good combination I've found (so you can resize font in pretty much any browser).

In terms of accessibility percentage and em are generally best for specifying text sizes. They still are probably useful for print, because if a person has his default font set larger, specifying the text size in points making it smaller won't be helpful for the person.

I attended a seminar by Macromedia about accessability for visually impaired people. They have a department of people who test such things. For screen resolution they suggested that all parameters for font-size be in percentage or EMS, allowing (as many as possible) browsers to resize correctly.

For menu structures that are size critical, they suggested building a site map page that visual impaired people could use to navigate the site.

Translation:

Since Flash isn't accessable, you need some text links somewhere! /lmaosmiley.gif" style="vertical-align:middle" emoid=":biglaugh:" border="0" alt="lmaosmiley.gif" />

i uses pixesls only along with my own text resizer. since IE won't change the sizes for them, the tool will.

But just to let you know the main reason is that it's plain easier to design in pixels. the others like em and %'s are relative so i'd rather know what my users will be looking at.

Who mentioned Flash. But since you opened pandora box. The later Flash products are accessible if used correctly, rending correctly in text readers, when text attributes are correctly defined. Don't know how, don't use Flash. /huh.gif" style="vertical-align:middle" emoid=":huh:" border="0" alt="huh.gif" />

I was however only refering to HTML accessability, as were the people at this seminar. The seminar itself was sponsored by the Royal Blind of NSW. (Australia.) The unit that they were showing off coverted screen text into Braile. Very clever!

Hint: There biggest winge: Javascript Menus.

Yep

Flash MX 2004 Pro is accesible by screenreaders

I found a site that discusses using Lists and CSS to construct menus. The site (which is not mine. Southwest Georgia is a long way from Australia, mate.) is http://css.maxdesign.com.au/listamatic/, and I recently modified one of their menus (colors, ID names, making the CSS more readable to my eye, and I wanted to see how it worked) for a project I am working on.

I've done a redesign of my Cheamweb Gallery where I used a horizontal list for my navigation. It worked out quite nicely.

What sizes should I use then..
Say I want two settings Normal, and Large.

-TJ Singleton

you can see how big I've made my sizes -> http://www.dustindiaz.com/
play with the font sizes in the 'tools' area

I would think, you would rather have font sizes fixed in some manner, just in case you have a browser that has a tendency to resize the text so big, that it runs right off the design. /huh.gif" style="vertical-align:middle" emoid=":huh:" border="0" alt="huh.gif" />

I like Dustin's text resizing buttons. /wink.gif" style="vertical-align:middle" emoid=";)" border="0" alt="wink.gif" />