# Standard Values

Many of the building block classes use relative values (xs through xl, etc.) to imply their values. The following is a representation of the actual values behind the relative naming scheme.

1. Font Sizes
2. Font Families
3. Line Heights
4. Spacings

## Font Sizes

All font sizes are rem-based, meaning that they are multiples of the document's root font size.

xs
  1.2rem (12px)
s
  1.4rem (14px)
standard
  1.4rem (14px)
m
  1.8rem (18px)
l
  2.0rem (20px)
xl
  2.4rem (24px)
xxl
  3.2rem (32px)
xxxl
  4.0rem (40px)

## Font Families

These are the predefined font families. A font family is a list of font faces by order of priority. If the first font face is not installed on the user's operating system, the next one will be used instead.

global
  Open Sans, Verdana, DejaVu Sans, Arial, Helvetica, sans-serif
headline
  Open Sans, Tahoma, Geneva, Arial, sans-serif

## Line Heights

The line height determines the total height of a line. Line heights are calculated as multiples of the font size.

s
  1.4
standard
  1.61

## Spacings

These values apply to margins, paddings, list spacings, and grid gutters.

Be aware: Gutters have a different standard implicit size as the other spacing elements. `gutter` has the value size of L

xs
  palm: 2px
  lap/desk: 4px
s
  palm: 4px
  lap/desk: 8px
standard (implicit size)
  palm: 8px
  lap/desk: 16px
m
  palm: 8px
  lap/desk: 16px
l
  palm: 16px
  lap/desk: 24px
xl
  palm: 24px
  lap/desk: 32px
xxl
  palm: 32px
  lap/desk: 40px