| Absolute Units | Abbreviation |
|---|---|
| inches (2.54 cm) <p style="border-top-width: '1in'"> | in |
| centimeters <p style="border-top-width: '1cm'"> | cm |
| millimeters <p style="border-top-width: '1mm'"> | mm |
| points <p style="border-top-width: '1pt'"> Point and Pica are typesetters units of measure. 12 points are equal to 1 pica. 6 picas is roughly equal to 1 inch. Therefore 72 points are roughly equal to one inch. | pt |
| picas <p style="border-top-width: '1pc'"> | pc |
| Relative Units | Abbreviation |
| mutt <p style="border-top-width: '1em'"> A "mutt" defines the space occupied by the capital letter "M" of the selected font. It is usually (not always) divided into 18 parts. I can find no reference to the degree that a mutt can be used. i.e. 1/18th of a mutt. I have only seen "0.5em" used. | em |
| x <p style="border-top-width: '1ex'"> The "x" height is the height of the lower-case "x" in the selected font. I can find no reference to whether or not it can be used in fractions. | ex |
| pixel <p style="border-top-width: '1px'"> A pixel is relative to the size of the canvas (the selected browser window) | px |