Compare Fonts → Sans Serif → Archivo vs Oxygen

Archivo vs Oxygen

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

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Archivo

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	Archivo	Oxygen	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	52.6%	53.6%	1.0%
Cap heightHeight of capitals, as a share of the font size.	68.6%	72.2%	3.6%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.77	0.74	0.03
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	9.2%	8.5%	0.7%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.81	0.81	0.00
Average character widthMean lowercase advance. Higher takes more horizontal space.	49.6%	50.4%	0.8%

Stroke weight: Archivo measures 9.2%, Oxygen measures 8.5%. Measured thickness of a vertical stroke. Higher is heavier on the page.
x-height: Archivo measures 52.6%, Oxygen measures 53.6%. Height of lowercase letters, as a share of the font size. Higher reads larger at the same point size.
x-height to cap ratio: Archivo measures 0.77, Oxygen measures 0.74. Proportion of lowercase to uppercase. Higher feels more modern and open.