Relative units
Guidelines
WCAG 2.0
3.4 Use relative rather than absolute units in markup language attribute values and style sheet property values.
Goals
- If you use relative units then your page will resize to fit individual needs.
- Use percentages to specify the width of tables. This refers to the percentage of the screen that the table will fill.
- Use percent (%), em, or the terms larger, smaller, etc. for the font-size property. This sets font-size relative to the defaults specified by the user, and allows him or her to change font sizes as needed using the browser.