Compare Fonts → Sans Serif → Open Sans vs Libre Franklin

Open Sans vs Libre Franklin

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

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Open 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.

Libre Franklin

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 differences

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	Open Sans	Libre Franklin	Difference
x-heightHeight of lowercase letters, as a share of the font size. Higher reads larger at the same point size.	53.5%	53.0%	0.5%
Cap heightHeight of capitals, as a share of the font size.	71.4%	74.2%	2.8%
x-height to cap ratioProportion of lowercase to uppercase. Higher feels more modern and open.	0.75	0.71	0.04
Stroke weightMeasured thickness of a vertical stroke. Higher is heavier on the page.	8.4%	8.6%	0.2%
Stroke contrastHorizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.	0.81	0.73	0.08
Average character widthMean lowercase advance. Higher takes more horizontal space.	52.2%	52.9%	0.7%

Where they diverge most

Stroke contrast: Open Sans measures 0.81, Libre Franklin measures 0.73. Horizontal stroke divided by vertical. 1.0 is even; below 0.5 means strong thick-thin modulation.
x-height to cap ratio: Open Sans measures 0.75, Libre Franklin measures 0.71. Proportion of lowercase to uppercase. Higher feels more modern and open.
Average character width: Open Sans measures 52.2%, Libre Franklin measures 52.9%. Mean lowercase advance. Higher takes more horizontal space.

At a glance

	Open Sans	Libre Franklin
Category	Sans Serif	Sans Serif
Weights	6	9
Variable axes	2	1
Language subsets	10	5
Designer	Steve Matteson	Impallari Type