When it comes to font size, there is no single “biggest font”. Different fonts come in different sizes, and the size of a font is typically measured in points. The larger the point size, the bigger the font appears to the reader. Fonts can be made to be as small as 1 point or as large as 720 points, but sizes outside this range are rarely used.
A point size of 72 is considered the maximum size a font can be used without it looking distorted or cluttered. Fonts with point sizes larger than 72 can be used, but usually only with a very limited range of characters. Additionally, the typeface of a font can also affect its size. For example, a font with a bold weight will appear larger than a font with a regular weight.
One of the best ways to ensure the largest font size is used is to use a font with a large x-height. The x-height is the distance between the baseline and the mean line of a font, and fonts with a large x-height will appear bigger than fonts with a small x-height. Additionally, fonts with a large x-height will also generally have larger letterforms, making it easier to read at larger sizes.
When it comes to selecting a font, there are several factors to consider. It is important to choose a font that is legible at the size it is being used, and it is also important to consider the style of the font. Some fonts may look better when used at larger sizes, while others might look better when used at smaller sizes. Ultimately, the size of the font chosen should depend on the purpose of the text and where it is being used.