* Font size: The font size, measured in points, determines the size of the characters used in a book. A larger font size will result in bigger writing.
* Leading: Leading is the amount of space between lines of text. A book with a larger leading will have more space between lines, making the writing appear bigger.
* Typeface: The typeface, or font style, can also affect the size of the writing. Some typefaces are naturally larger than others.
* Page size: The size of the page can also affect the appearance of the writing. A book with a larger page size will have more room for larger writing.
* Trim size: The trim size of a book is the finished size of the book, including the cover. A book with a larger trim size will have more room for larger writing.
* Target audience: The target audience of a book can also influence the size of the writing. Books intended for children or people with low vision may have larger writing.
* Design considerations: The book's overall design can also play a role in determining the size of the writing. A book with a lot of illustrations or graphics may have smaller writing to accommodate the other elements on the page.
* Readability: The readability of a book is important, and the size of the writing can affect how easy it is to read. Larger writing is generally easier to read, especially for people with low vision or dyslexia.