How do I set default text size?

Hello lightsomely_up,

Thanks for reaching out to Apple Support Communities. We've reviewed your question and it looks like you want information on the font size on your iPhone. It's understandable that you'd want this clarified, so allow us to assist with that. The article that your question was linked from is very helpful when considering this issue: Change the font size on your iPhone, iPad, and iPod touch. 

In this article, it explains two ways to see the font options: one with a Text Size slider (that does not identify a specific font number, but shows on a slider what it looks like) and one way through Accessibility that shows the same type of slider under the Larger Text section. Your iPhone by default would have started on the third choice from the left on this slider.

If you have follow-up questions, please let us know. We're here for you. Have a fantastic day!

You are very welcome, lightsomely_up. Please let us know if there's anything we can assist with in the future. Have a great day!