Compare Fonts → Sans Serif → Karla vs Exo 2

Karla vs Exo 2

Both are sans serif faces on Google Fonts. Exo 2 has the larger x-height, so it looks bigger at the same size. Karla takes more horizontal space.

Try your own text

Karla

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	Karla	Exo 2	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	47.8%	48.7%	0.9%
Cap heightHeight of capitals, as a share of the font size.	62.8%	69.0%	6.2%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.76	0.71	0.06
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	8.0%	8.8%	0.9%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.85	0.81	0.04
Average character widthMean lowercase advance. Higher takes more horizontal space.	52.0%	51.9%	0.1%

Stroke weight: Karla measures 8.0%, Exo 2 measures 8.8%. Measured thickness of a vertical stroke. Higher is heavier on the page.
x-height to cap ratio: Karla measures 0.76, Exo 2 measures 0.71. Proportion of lowercase to uppercase. Higher feels more modern and open.
Stroke contrast: Karla measures 0.85, Exo 2 measures 0.81. Horizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.