Compare Fonts → Sans Serif → Work Sans vs Saira

Work Sans vs Saira

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

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Work Sans

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	Work Sans	Saira	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	50.0%	51.0%	1.0%
Cap heightHeight of capitals, as a share of the font size.	66.0%	68.8%	2.8%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.76	0.74	0.02
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	8.0%	8.2%	0.2%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.86	0.85	0.02
Average character widthMean lowercase advance. Higher takes more horizontal space.	54.8%	52.6%	2.1%

Average character width: Work Sans measures 54.8%, Saira measures 52.6%. Mean lowercase advance. Higher takes more horizontal space.
x-height: Work Sans measures 50.0%, Saira measures 51.0%. Height of lowercase letters, as a share of the font size. Higher reads larger at the same point size.
x-height to cap ratio: Work Sans measures 0.76, Saira measures 0.74. Proportion of lowercase to uppercase. Higher feels more modern and open.