The font on Wikipedia on my iPhone has suddenly got very small. It just seems to be affecting Wikipedia. Everything else is unchanged.
Any idea how I can make it display larger?
What browser do you use? Safari?
Yes, Safari
There’s a free app that will display Wikipedia articles. You might prefer it, or not. I used to use it a long time ago but the web site works well enough for me in Safari that I no longer bother.
Are you sure you didn’t accidentally switch to the desktop version of the site? At the bottom of each page there should be a link to the desktop version from the mobile version and vice versa. The desktop version has much smaller text.
Aside from the multitude of other possible issues, some Wikipedia articles have wide tables at various points further down in the article, and that causes some browsers (like the one on my tablet) to automatically zoom out to fit. So in those situations I see very tiny text for no apparent reason, and only when scrolling down do I finally discover the table that caused it.
I’ve encountered this several times on my iPhone (iOS 10.3.2) as well. But not every time - sometimes the table is cut-off, and I can’t scroll right to see the rest of the table.