Compare Fonts → Sans Serif → Mulish vs Rethink Sans

Mulish vs Rethink Sans

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

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Mulish

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	Mulish	Rethink Sans	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	50.0%	49.6%	0.4%
Cap heightHeight of capitals, as a share of the font size.	70.5%	70.0%	0.5%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.71	0.71	0.00
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	8.3%	8.5%	0.3%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.79	0.86	0.06
Average character widthMean lowercase advance. Higher takes more horizontal space.	52.3%	52.1%	0.2%

Stroke contrast: Mulish measures 0.79, Rethink Sans measures 0.86. Horizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.
Stroke weight: Mulish measures 8.3%, Rethink Sans measures 8.5%. Measured thickness of a vertical stroke. Higher is heavier on the page.
x-height: Mulish measures 50.0%, Rethink Sans measures 49.6%. Height of lowercase letters, as a share of the font size. Higher reads larger at the same point size.