Does font size matter with SEO?

I remember seeing Lighthouse spit back any text which was under 16px also. It then briefly went to 14px, then completely disappeared. 

If the text is too small, I have no doubt in my mind the page simply wouldn't rank. It's not something I've really seen being discussed in SEO, but it's common sense if the user can't see the text, or has to zoom in, or in even in the slightest bit of difficulty while reading it, odds are, it'll look very bad on said page and I'm going to assume Google will downgrade said page. Note: this is my opinion, I've never tested it.

The answer to this can get really complex and depends on how deep you wish to go. 

Text is there for a user to read and therefore should be readable, (just so happens google use it as well) The variable part though is screen size and resolution. This is the same for mobile and desktop. So on some devices, 16px could seem huge but on others impossible to read. 

This is why using px is not recommended as that measures the font in pixels, the correct way is to use REM. 

Now although this was not part of your question it is also related, that is font colour (or color, depending on where you live) Text should have sufficient contrast to also make it easy to read. Failing on this can have a negative effect. 

There used to an old black hat technique where you put small text in white on a white background to stuff your keywords into a page. The user would not see the text but google would and used to rank you for that text. To combat this they do take contrast into account to confirm the text is visible. 

A technique I have not seen to quite a while now is webmasters used to offer impaired vision users a high contrast skin to their website. Its quite a bit of extra work for the webmaster so it seems it's now gone out of fashion and now depend on users to install plugins to achieve the same result.

As a webmaster I know its always a battle between designers and SEO, style tends to win to begin with until the owner starts moaning that rankings are not where they should be. So if your starting a new project and can offer input into the design then make sure the text is easily readable on many devices and where possible even users with sight problems.  

I  personally believe that the font size of the content has nothing to do with SEO. Being a Content Developer, I prefer font-size ranging from 10-14 that will become readable for the users. 

I would suggest the spacing of the words, type of font, the correct use of headings, unique & informative content and overall structure of the content will help your users to stay and not bounce back that will inevitably act on SEO. 

A better user experience generally leads to better SEO and will increase your website DA. 

width: 210 pixels or 220 Pixels
height: will be adjusted automatically if you use Pothoscape and I write about the Printer Driver then I upload the printer photo. I wrote on WordPress

for example: 

Font size impacts user experience and may impact SEO in certain cases. Providing users multiple font size options to choose from i.e small, medium, large helps user experience. Search spiders do look for usage of bold, italics and H1 tags on a web page. Better user experience generally lead to better SEO.

A font size too small makes it impossible to read, but a font size too large is harmful as well. Large fonts should be limited to headings and titles, or used in images and infographics. Avoid using large font – size 20 or more – in normal text; it becomes hard to read more than a paragraph without scrolling, and users don’t like scrolling if they aren’t already engaged.

yes its matters, because every font size has a limit to use on the website, if you exceed the limits of front size uses your website is not optimized according to google.

yes its metter

Yes it matters. You can search it on Google about the recommended font size for website's SEO. I am sure you will get satisfactory answer.

Indeed, it impacts your SEO. Truth be told, a straightforward change to your topic's settings page or your template can possibly further develop your site SEO, transformation and client experience in a way you didn't envision. Further developing your text dimension is regularly simple.

It's not that much connected with SEO. But Google is tried to give the best User Experience for their users. Sometime small is hard to read to read for the users in that point of view it will affect a bad user experience in your website. And bad user experience is not a good sign of SEO.

It's not that much connected with SEO. But Google is tried to give the best User Experience for their users. Sometime small is hard to read for the users in that point of view it will affect a bad user experience in your website. And bad user experience is not a good sign of SEO.