Understanding typography

Typography expresses hierarchy and brand presence.

Type properties

A typeface is a collection of letters. While each letter is unique, specific shapes are shared across letters. A typeface represents shared patterns across a collection of letters. Typefaces selected for their style, legibility, and readability are most effective when following the fundamental principles of typographic design.


The baseline is the invisible line upon which a line of text rests. In Material Design, the baseline is important in measuring the vertical distance between text and an element.

4dp grid

The type aligns with the 4dp baseline grid.

Regardless of pt/sp size, a text’s baseline must sit on the 4dp grid. Line height must be a value divisible by 4 to maintain the grid.


Measurement from the baseline

Specify distances from UI elements from the baseline. Baseline values are software-agnostic, so they work in any design program and with the grid. On Android and iOS, code can be translated from baseline-relative specs into padding. For the web, automate the calculation using Sass or CSS.

Left: Reference baselines for vertical alignment instead of bounding boxes. This produces more accurate implementation across design software and platforms. Right: Measure text in relation to other components.


Cap height

Cap height is the height of a typeface’s flat capital letters (such as M or I) measured from the baseline. Round and pointed capital letters, such as S and A, are optically adjusted by being drawn with a slight overshoot above the cap height to achieve the effect of being the same size. Every typeface has a unique cap height.



X-height refers to the height of the lowercase x for a typeface, indicating how tall or short each glyph in a typeface will be. Typefaces with tall x-heights have better legibility at small font sizes, as the white space within each letter is more legible.

The height of a typeface’s lower-case x determines its x-height.


Ascenders and descenders

Ascenders are upward vertical strokes in certain lowercase letters extending beyond the cap height or baseline. Descenders are the downward vertical strokes in these letters. Sometimes, these strokes collide when the line height (the vertical distance between baselines) is too tight.



Weight refers to the relative thickness of a font’s stroke. A typeface can come in many weights, and four to six weights are a typical number available for a typeface.

Common weights:
1. Light
2. Regular
3. Medium
4. Bold


Type classification


A serif is a small shape or projection that appears at the beginning or end of a stroke on a letter. Typefaces with serifs are called serif typefaces. Serif fonts are classified as one of the following:

Old-style serifs resemble writing in ink, with:

  • Low contrast between thick and thin strokes
  • Diagonal stress in the strokes
  • Slanted serifs on lower-case ascenders

Transitional serifs have:

  • High contrast between thick and thin strokes
  • Medium-High x-height
  • Vertical stress in the strokes
  • Bracketed serifs

Didone or neoclassical serifs have:

  • Very high contrast between thick and thin strokes
  • Vertical stress in the strokes
  • “Ball” terminal strokes.

Slab serifs have:

  • Heavy serifs with imperceptible differences between the stroke weight
  • Minimal or no bracketing
1. EB Garamond, old-style serif
2. Libre Baskerville, transitional serif
3. Libre Bodoni, didone / neoclassical serif
4. Bitter, slab serif


Related Google Fonts links

Sans Serif

A typeface without serifs is called a sans serif typeface, from the French word “sans,” which means “without.” Sans serifs can be classified as one of the following:

  • Grotesque: Low contrast between thick and thin strokes, vertical or no observable stress
  • Humanist: Medium contrast between thick and thin strokes, slanted stress
  • Geometric: Low contrast between thick and thin strokes, with vertical stress, and circular round forms
1. Work Sans, grotesque sans serif
2. Alegreya Sans, humanist sans serif
3. Quicksand, geometric sans serif



Monospace typefaces display all characters with the same width.

1. Roboto Mono, monospace
2. Space Mono, monospace
3. VT323, monospace



Handwriting typefaces are unconventional with a natural, handwritten feel. These typically are used as H1 – H6 in your type scale. They come in the following forms:

  • Black letter: High contrast, narrow, with straight lines and angular curves
  • Script: Replication of calligraphic styles of writing (more formal)
  • Handwriting: Replication of handwriting (less formal)
1. UnifrakturMaguntia, black letter
2. Dancing Script, script
3. Indie Flower, handwriting



A miscellaneous category for all classification types that are only suitable for use at large point sizes. Display fonts typically are used as H1 – H6 in your type scale.

1. Shrikhand, display
2. Chewy, display
3. Faster One, display



While the characters in a typeface determine legibility, readability refers to how easy it is to read words or blocks of text, which is affected by the style of a typeface.

Letter Spacing

Letter spacing, also called tracking, refers to the uniform adjustment of the space between letters in a text.

Larger type sizes, such as headlines, use tighter letter-spacing to improve readability and reduce space between letters.

Tighter letter-spacing

For smaller type sizes, looser letter spacing can improve readability as more space between letters increases the contrast between each letter shape. Text in all caps, even at small type sizes, has improved readability because of its added letter spacing.

Looser letter spacing


Tabular figures

Use tabular figures (monospaced numbers) rather than proportional digits in tables or places where values change often.

Tabular figures keep values optically aligned for better scanning.


Line length

Line lengths for body text are usually between 40 to 60 characters. In areas with wider line lengths, such as desktops, longer lines that contain up to 120 characters will need an increased line height from 20sp to 24sp.

The ideal line length for English body text is 40-60 characters per line.


The ideal line length for short lines of English text is 20-40 characters per line.


Line height

Line height, known as leading, controls the space between baselines in a text block. A text’s line height is proportional to its type size.

1. Type size 14, Line-height 20dp
2. Type size 20, Line-height 28dp


Paragraph spacing

Keep paragraph spacing between .75x and 1.25x of the type size.

Type size 20sp, line-height 30dp, paragraph spacing 28dp


Type alignment

Type alignment controls how the text aligns in the space it appears. There are three types of alignments:

  • Left-aligned: when text is aligned to the left margin
  • Right-aligned: when text is aligned to the right margin
  • Centered: when text is aligned to the center of the area it is set in


Left-aligned text is the most common setting for left-to-right languages such as English.

Left-aligned text applied to the body copy.



Right-aligned text is the most common setting for right-to-left languages, such as Arabic and Hebrew.

Left-to-right languages can use right-aligned text, which is best for distinguishing short typographic elements within a layout (such as side notes) and is not recommended for long copies.

Right-aligned text applied to a side note.



Centered text is best used to distinguish short typographic elements within a layout (such as pull quotes), and is not recommended for long copy.

Center-aligned text applied to a pull quote.


System fonts

System fonts come pre-installed on your computer or device. They typically have broad language support and no licensing costs for developers. Using the system default font in your app unites the platform’s consistency with your app’s look and feel. However, they may not stand out because they appear in many places on devices.

Using system fonts

Native system typefaces should be used for large blocks of text and any text below 14sp. Roboto is the default system font for Android. For platforms outside of Android and web products, use a system typeface that is preferred on that platform. For example, iOS applications should use Apple’s San Francisco font.