Viewers like readable fonts

The bigger things are the better they should be. That’s not always the case when it comes to web designing. If readers tend to enlarge font or text size just to read your site, then you probably should think twice about it. Still using HTML font tags for your site? Time to dive into CCS as it is more flexible, easier to maintain, and has lesser bandwidth requirements.
Here are just some tips regarding font sizes:
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Size: respect the users’ preferences, avoid small size for content
Anything less than 1em would make your readers squint or go for the CTRL+Mouse roller. It’s not good.
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Units: avoid absolute length units for screen display
Rather than use font size in pt, go for the absolute length units
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Legible font-family
If you really need to make your fonts small then it’s better to go for a font-family with aspect values that are high.
To get more details on this, please go to this site.