HTML attribute: size

The size attribute defines the width of the <input> and the height of the <select> element. For an input element, it defines the number of characters that the user agent allows the user to see when editing the value. For a select element, it defines the number of options that should be shown to the user. This must be a valid non-negative integer greater than zero.

If no size is specified, or an invalid value is specified, the input has no size declared, and the form control will be the default width based on the user agent. If CSS targets the element with properties impacting the width, CSS takes precedence.

The size attribute has no impact on constraint validation.

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Examples

By adding size on some input types, the width of the input can be controlled. Adding size on a select changes the height, defining how many options are visible in the closed state.

html
<label for="fruit">Enter a fruit</label>
<input type="text" size="15" id="fruit" />
<label for="vegetable">Enter a vegetable</label>
<input type="text" id="vegetable" />

<select name="fruits" size="5">
  <option>banana</option>
  <option>cherry</option>
  <option>strawberry</option>
  <option>durian</option>
  <option>blueberry</option>
</select>

<select name="vegetables" size="5">
  <option>carrot</option>
  <option>cucumber</option>
  <option>cauliflower</option>
  <option>celery</option>
  <option>collard greens</option>
</select>

Specifications

Specification
HTML Standard
# attr-select-size
HTML Standard
# attr-input-size

Browser compatibility

html.elements.select.size

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
size

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

html.elements.input.size

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
size

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also