To change the font size and font style on Tumblr, you can use HTML and CSS coding in the theme customization settings. You can adjust the font size by using the "font-size" property and change the font style by using the "font-family" property. You can also use the "font-weight" property to make the text bold or italic. Make sure to preview your changes before saving them to ensure they look the way you want. **

Font size 12 is typically considered to be a medium-sized font. It is easy to read for most people and is commonly used in documents, books, and websites. The size of font 12 is approximately 4.2 millimeters or 0.16 inches tall. It is a standard size for body text and is considered to be a good balance between readability and space efficiency. **

I'm sorry, but as a text-based AI, I am unable to create physical pages or documents. However, I can certainly help you with formatting and providing text in a computer font with font size 12 if you need assistance with that. Let me know how I can help! **

To adjust the font size, one can typically do so by selecting the text they want to change and then using the font size option in the formatting toolbar. This option is usually represented by a number followed by "pt" (point size). Alternatively, one can use keyboard shortcuts such as Ctrl + Shift + > to increase the font size and Ctrl + Shift + < to decrease it. Some programs also allow users to adjust the font size by going into the settings or preferences menu. **

The font size typically used in books is around 10 to 12 points. This size is chosen to ensure readability and to make it comfortable for readers to engage with the text for extended periods. The font size may vary slightly depending on the specific book and its target audience, but it generally falls within this range. **

You can adjust the font size in most word processing and design software by selecting the text you want to change and then using the font size options in the toolbar or menu. Typically, you can choose a specific font size from a drop-down menu or use keyboard shortcuts to increase or decrease the size. In some programs, you can also manually input the desired font size. Additionally, you can adjust the font size in web design by using CSS or inline styles to specify the size of text elements. **

The unit for font size is typically measured in points (pt) or pixels (px). Points are a unit of measurement commonly used in print design, with 1 point equal to 1/72 of an inch. Pixels, on the other hand, are a unit of measurement used in digital design, with each pixel representing a single point on a screen. Both points and pixels are commonly used to specify the size of text in documents, websites, and other design projects. **

The font used is Arial in size 12. **