Regular, or upright – Fonts Knowledge - Google Fonts

Either the “Regular” weight of a typeface, usually assigned the font-weight value of 400, or the “Regular” upright style (i.e., non-italic) of a typeface.

Browse Fonts - Google Fonts

Making sense of typographic classifications – Fonts Knowledge - Google Fonts

Free Upright Fonts

Google Fonts Knowledge

Elliot Jay Stocks Google Fonts Knowledge

How type influences readability – Fonts Knowledge - Google Fonts

The complications of typographic size on the web – Fonts Knowledge - Google Fonts

Type – Fonts Knowledge - Google Fonts

Fonts Knowledge - Google Fonts

Fonts Knowledge - Google Fonts

Introducing variable fonts – Fonts Knowledge - Google Fonts