HTML size, rows, and cols: Control Dimensions

Think of filling out a sign-up page. Clear fields make the job simple; confusing fields make people leave.

What You Need to Know

Size, rows, and cols influence the preferred dimensions of controls; CSS can change their final appearance.

In this example: set textarea rows and cols.

Try the Example

Take a look at the example. We’ll explain the important lines right below it.

<form action="/notes" method="post">
    <label for="alias">Alias</label>
    <input id="alias" name="alias" size="20">
    <label for="story">Your story</label>
    <textarea id="story" name="story" rows="5" cols="35"></textarea>
    <button type="submit">Save</button>
</form>

Let’s Read the Code

<form>: The form groups controls and identifies where submitted data goes.
<label>: The label tells people what the input is for. A matching for/id pair makes the label clickable.
for: For connects a label or output with a control by ID.
id: An id uniquely identifies an element on this page.

Read the named elements and attributes together. They explain how the browser connects this feature to the rest of the page.

What Happens in the Browser?

The HTML controls work in the browser, but saving an answer requires the example action path to be handled by a real server.

Where does the answer go? The example uses the submitted name(s) alias, story. Those names help the receiving server identify each answer. A label is for people; a name attribute is for the form data; an ID connects elements in the page.

Your Turn

Increase rows and compare the textarea without altering its actual content.

Common Beginner Mistakes

Copying the example without giving the fields a clear label and a usable name.
A taller textarea is not automatically allowed to store more text; use maxlength if you need a text limit.

Key Takeaways

With size, rows, and cols: Control Dimensions, the main idea is to match the HTML to the visitor’s task, not just to copy an unfamiliar attribute.
<form>: The form groups controls and identifies where submitted data goes.
Test the behavior you expect rather than trusting how the snippet looks in your editor.