Compare Fonts → Sans Serif → Rubik vs Public Sans

Rubik vs Public Sans

Both are sans serif faces on Google Fonts. Rubik has the larger x-height, so it looks bigger at the same size. Rubik takes more horizontal space.

Try your own text

Rubik

Handgloves & Quartz Jockeys

The quick brown fox jumps over the lazy dog. Pack my box with five dozen liquor jugs, then ship it to 1,842 Grove Street by 9:30 AM.

Handgloves & Quartz Jockeys

The quick brown fox jumps over the lazy dog. Pack my box with five dozen liquor jugs, then ship it to 1,842 Grove Street by 9:30 AM.

Measured from the font files. Heights and widths are shown as a share of the font size, so they compare directly at any point size.
Measurement	Rubik	Public Sans	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	52.0%	51.7%	0.3%
Cap heightHeight of capitals, as a share of the font size.	70.0%	72.3%	2.3%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.74	0.71	0.03
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	9.6%	9.2%	0.4%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.80	0.79	0.01
Average character widthMean lowercase advance. Higher takes more horizontal space.	53.1%	52.9%	0.2%

x-height to cap ratio: Rubik measures 0.74, Public Sans measures 0.71. Proportion of lowercase to uppercase. Higher feels more modern and open.
Stroke weight: Rubik measures 9.6%, Public Sans measures 9.2%. Measured thickness of a vertical stroke. Higher is heavier on the page.
x-height: Rubik measures 52.0%, Public Sans measures 51.7%. Height of lowercase letters, as a share of the font size. Higher reads larger at the same point size.