The fastest way depends on what you're using

Font size lives in the toolbar of almost every program that lets you type — Word, Google Docs, Gmail, even Notes on your phone. It's usually a dropdown box with a number in it, often near the bold and italic buttons. Click or tap that box, pick a new size, and highlight the text you want to change. The text resizes instantly.

If you can't find the toolbar, look for a menu called Format or Tools. Every program hides this button somewhere slightly different, but the principle is always the same: select text first, then change the size. Changing the size before you select text won't work — the program doesn't know what you want to resize.

Key Takeaways

  • Font size lives in the toolbar as a dropdown box with a number, usually between 8 and 72 points, and you must select text before changing it.
  • Highlight the text you want to resize, click the font size box, and pick a new number — the change happens immediately.
  • If the toolbar is hidden, look in the Format or Tools menu to find font size options.
  • You can change the default font size so new documents start at your preferred size instead of the program's standard.

How to resize text in Microsoft Word

Open your document and highlight the words you want to make bigger or smaller. Look at the top of the screen for the toolbar. You'll see a box with a number in it — usually "11" or "12" — next to a dropdown arrow. Click that box and a list of sizes appears: 8, 9, 10, 11, 12, 14, 16, 18, 20, 22, 24, 26, 28, 36, 48, 72. Pick the size you want.

If you don't see the toolbar, go to the View menu at the very top and click "Ribbon". The toolbar will reappear. You can also type a custom size directly into the font size box — if you want 15 point text, click the box, delete what's there, type "15", and press Enter.

To change the default size for all new documents, go to Home, then click the small arrow in the bottom right corner of the Font section. A dialog box opens. Pick your preferred size, then click "Set as Default" at the bottom. Every new document will now start at that size.

How to resize text in Google Docs

Highlight the text you want to change. At the top of the page, find the font size dropdown — it shows a number, usually "11". Click it and a list appears with sizes from 8 to 36, plus a "More sizes" option at the bottom if you need something larger. Click your choice and the text resizes.

Google Docs also lets you type a custom size. Click the font size box, clear the number, type what you want (like "18"), and press Enter. If you want to change the default for all new documents, highlight some text in the size you prefer, then go to Format > Paragraph styles > Normal text > Update "Normal text" to match. From now on, new documents will use that size.

How to resize text in Gmail

When you're writing an email, look for the font size button in the toolbar below the subject line. It looks like an "A" with up and down arrows next to it, or sometimes shows a number. Click it and a dropdown appears with sizes from 8 to 36 point. Pick the size you want, then type or paste your message. The text will appear in that size.

If you've already typed the email, highlight the text first, then click the font size button and choose a new size. Gmail doesn't let you set a permanent default the way Word and Docs do, so you'll need to set the size each time you start a new email.

How to resize text on your phone or tablet

On an iPhone or iPad, open Notes or Mail and start typing. Tap the text you want to resize, then look for a button that says "Aa" or shows font options. Tap it and you'll see size choices. Select the size you want. On Android, the process is similar — tap the text, look for a formatting menu (often three dots), and find the font size option.

Some phone apps don't have a font size button in the text editor itself. If you can't find it, try going to Settings on your phone, then Accessibility or Display, where you can change the text size for the whole phone. This affects how large text appears everywhere, not just in one app.

What the numbers mean

Font sizes are measured in points. One point is 1/72 of an inch. A size of 12 point is standard for most documents and emails — it's readable on screen and prints well. Sizes 10 and 11 are smaller and fit more text on a page. Sizes 14, 16, and 18 are noticeably larger and easier to read from a distance.

For headings, people often use 18, 20, or 24 point. For body text in a document meant to be printed, 11 or 12 point is standard. For a presentation slide, 28 point or larger is common so people in the back of the room can read it. There's no single "correct" size — it depends on what you're making and who will read it.

When font size won't change

If you highlight text and the font size button won't respond, the text might be locked or part of a template. In Word, check the Format menu for "Protect Document" or "Restrict Editing" — if either is on, you may not be able to change formatting. In Google Docs, check if the document is in "Suggestion" mode rather than "Edit" mode; you can't change formatting in Suggestion mode.

Another common problem: you changed the size but it looks the same. This usually means the text was already that size, or the change didn't save. Highlight the text again, check what size the font size box shows, and try clicking a clearly different size — jump from 12 to 18 instead of 12 to 13. If it still won't change, try closing and reopening the document.

Frequently Asked Questions

Can I change font size for just one paragraph?

Yes. Highlight only that paragraph, then change the size. The change affects only the text you selected. If you want to change multiple separate paragraphs to the same size, highlight the first one, change it, then repeat for each paragraph. Or highlight all of them at once by holding Ctrl (or Cmd on Mac) and clicking each paragraph.

What's the difference between font size and line spacing?

Font size is how tall the letters are. Line spacing is the space between lines of text. They're separate settings. You can have large font with tight spacing, or small font with loose spacing. Line spacing is usually in the Format menu under Paragraph or Line Spacing.

Will changing font size affect how my document prints?

Yes. If you make text larger, it takes up more space on the page and may push content onto additional pages. If you make text smaller, more fits on each page. Always preview how your document looks before printing — in Word and Docs, go to File > Print Preview to see exactly what will print.

Can I make text bigger without changing the font size number?

Not really. Font size is the main control for how large text appears. You could try changing the font itself — some fonts look bigger than others at the same point size — but the actual size number is what controls height. Increasing line spacing makes text feel more spread out but doesn't make individual letters bigger.

How do I change font size in a PDF?

Most PDFs are locked and can't be edited directly. If you need to change text in a PDF, you usually have to convert it to Word or Google Docs first, make your changes there, then save it as a PDF again. Some PDF editors like Adobe Acrobat Pro let you edit text directly, but they cost money. Free PDF readers don't usually have this feature.