Open Sans is a humanist sans-serif typeface which is designed by Steve Matteson and further commissioned by Google. According to Google, this font family was developed with an “upright stress, open forms and a neutral, yet friendly appearance” and it’s highly optimized and legible across print, web, and mobile interfaces.
Open Sans features wide apertures on many letters and a large x-height (tall lower-case letters), the typeface is super legible on screen and at small sizes. It proudly belongs to the humanist genre of sans-serif typefaces, with true italic versions.
Open Sans is used in some of Google’s web pages as well as its print and web advertisements. Its design is almost identical to that of Matteson’t Droid Sans, created as the first user interface font for Android phones, but with wider characters and the inclusion of italic variants.
Open Sans is available in a large number of variants, including five weights (300 Light, 400 Normal, Semi-Bold 600, Bold 700 and Extra Bold 800), each of them comes with italic versions, totaling ten variants. There is a separate font called Open Sans Condensed is available with 3 width variations.