Is there a way to measure readability for desktop? We are currently using Museo Sans 14px for body text and are wondering if increasing it to 16px would help pages being read more easily? Is there any usability study for Museo Sans out there?
There's no concrete usability study, but you can see some examples of Museo Sans at different font-size with 1.4em line-height along with body size comparison - https://typekit.com/fonts/museo-sans/n3/wfs
I would also recommend going through this article on Typekit - Selecting typefaces for body text For Museo Sans, it says:
Museo Sans' shapes are sturdy and its color is even, but its texture is fairly dull. This is a clear example of a multipurpose font seeming okay for body text, until it is compared with fonts made for that purpose.
P.S - The following fonts are recommended for paragraphs by Typekit - https://typekit.com/fonts?recommended-for=paragraphs