Radio buttons

Use radio buttons when you want the user to select only one option from a list.

  • Content:
    @use 'sass:math';
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/global.variables' as globalVariables;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/spacing.variables' as spacing;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/colours.variables' as colours;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/breakpoints.variables' as breakpoints;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/typography.variables' as typography;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/z-index.variables' as zIndex;
    @use '@ongov/ontario-design-system-global-styles/dist/styles/scss/1-variables/font-sizes.variables' as fontSizes;
    $ontario-touch-target-size: 36px;
    $ontario-touch-target-size-mobile: 40px;
    $ontario-radios-size: 32px;
    $ontario-radios-size-mobile: 36px;
    $ontario-input-offset: math.div($ontario-touch-target-size - $ontario-radios-size, 2);
    * .ontario-radios {
    	-webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    	-moz-tap-highlight-color: rgba(0, 0, 0, 0);
    .ontario-radios {
    	padding: 0 0 0 math.div(spacing.$spacing-1, 2);
    	margin-bottom: spacing.$spacing-7;
    	max-width: globalVariables.$standard-width;
    .ontario-radios__item {
    	position: relative;
    	display: block;
    	margin: spacing.$spacing-0 spacing.$spacing-0 spacing.$spacing-4;
    	padding: spacing.$spacing-0 spacing.$spacing-6 spacing.$spacing-0;
    	&:last-of-type {
    		margin-bottom: spacing.$spacing-0;
    .ontario-radios__input {
    	cursor: pointer;
    	margin: spacing.$spacing-0;
    	position: absolute;
    	opacity: 0;
    	top: $ontario-input-offset * -1;
    	left: $ontario-input-offset * -1;
    	width: $ontario-touch-target-size;
    	height: $ontario-touch-target-size;
    	z-index: zIndex.$ontario-z-index-above-low;
    	@media screen and (max-width: breakpoints.$small-breakpoint) {
    		width: $ontario-touch-target-size-mobile;
    		height: $ontario-touch-target-size-mobile;
    		top: $ontario-input-offset * -0.75;
    		left: $ontario-input-offset * -0.75;
    .ontario-radios__label {
    	display: inline-block;
    	font-size: fontSizes.$ontario-font-size-standard-body-text;
    	margin: 0.2rem spacing.$spacing-0;
    	padding: spacing.$spacing-0 spacing.$spacing-3;
    	// remove 300ms pause on mobile
    	touch-action: manipulation;
    	white-space: normal;
    	@media screen and (max-width: breakpoints.$small-breakpoint) {
    		margin: 0.3rem spacing.$spacing-0;
    		padding: 0 1rem;
    	&:before {
    		content: '';
    		border: 2px solid colours.$ontario-colour-black;
    		border-radius: 50%;
    		box-sizing: border-box;
    		position: absolute;
    		top: 0;
    		left: 0;
    		width: $ontario-radios-size;
    		height: $ontario-radios-size;
    		transition: border 0.1s ease-in-out;
    		@media screen and (max-width: breakpoints.$small-breakpoint) {
    			width: $ontario-radios-size-mobile;
    			height: $ontario-radios-size-mobile;
    	&:after {
    		content: '';
    		border-radius: 50%;
    		border: 10px solid colours.$ontario-colour-black;
    		position: absolute;
    		top: 0;
    		left: 0;
    		transform: translate($ontario-input-offset * 3, $ontario-input-offset * 3);
    		opacity: 0;
    		@media screen and (max-width: breakpoints.$small-breakpoint) {
    			border: 12px solid colours.$ontario-colour-black;
    .ontario-radios__input:focus + .ontario-radios__label:before {
    	-moz-box-shadow: 0 0 0 4px colours.$ontario-colour-focus;
    	-webkit-box-shadow: colours.$ontario-colour-focus;
    	box-shadow: 0 0 0 4px colours.$ontario-colour-focus;
    	outline: 4px solid transparent;
    	transition: box-shadow 0.1s ease-in-out;
    .ontario-radios__input:checked + .ontario-radios__label:after {
    	opacity: 1;
  • URL: /components/raw/radio-buttons/radio-buttons.scss
  • Filesystem Path: fractal/components/components/form/radio-buttons/radio-buttons.scss
  • Size: 3.7 KB
  • Content:
    * .ontario-radios{-webkit-tap-highlight-color:rgba(0,0,0,0);-moz-tap-highlight-color:rgba(0,0,0,0)}.ontario-radios{padding:0 0 0 .125rem;margin-bottom:2.5rem;max-width:48rem}.ontario-radios__item{position:relative;display:block;margin:0 0 1rem;padding:0 2rem 0}.ontario-radios__item:last-of-type{margin-bottom:0}.ontario-radios__input{cursor:pointer;margin:0;position:absolute;opacity:0;top:-2px;left:-2px;width:36px;height:36px;z-index:1}@media screen and (max-width: 40em){.ontario-radios__input{width:40px;height:40px;top:-1.5px;left:-1.5px}}.ontario-radios__label{display:inline-block;font-size:1rem;margin:.2rem 0;padding:0 .75rem;touch-action:manipulation;white-space:normal}@media screen and (max-width: 40em){.ontario-radios__label{margin:.3rem 0;padding:0 1rem}}.ontario-radios__label:before{content:"";border:2px solid #1a1a1a;border-radius:50%;box-sizing:border-box;position:absolute;top:0;left:0;width:32px;height:32px;transition:border .1s ease-in-out}@media screen and (max-width: 40em){.ontario-radios__label:before{width:36px;height:36px}}.ontario-radios__label:after{content:"";border-radius:50%;border:10px solid #1a1a1a;position:absolute;top:0;left:0;transform:translate(6px, 6px);opacity:0}@media screen and (max-width: 40em){.ontario-radios__label:after{border:12px solid #1a1a1a}}.ontario-radios__input:focus+.ontario-radios__label:before{box-shadow:0 0 0 4px #009adb;outline:4px solid transparent;transition:box-shadow .1s ease-in-out}.ontario-radios__input:checked+.ontario-radios__label:after{opacity:1}
  • URL: /components/raw/radio-buttons/radio-buttons.css
  • Filesystem Path: fractal/components/components/form/radio-buttons/radio-buttons.css
  • Size: 1.5 KB

Guiding principle: Give the user control.

When to use this component

Use radio buttons when you want the user to select only one option from a list.

If you want the user to select more than one option use a list with checkboxes.

Order of radio button lists

Put radio button lists in alphabetical order, with these exceptions:

  • list yes before no
  • if there is an option that you know about 90% or more of your users will choose, put that option first
    • for example, list Ontario first if users are choosing their province from a list
    • be careful not to bias the user’s choice or imply the importance of option one over another
  • put any “None of the above” or “I do not know” options last

Technical specifications


Heading: choose your renewal term (required). Two radio buttons with options listing Two year and One year. Arrow pointing to the Two Year option to indicate label.


  • always include an associated label with a matching ID next to each radio button
  • position radio buttons to the left of their labels
  • left-align radio buttons
  • always make the label and the radio button selectable
  • stack radio buttons vertically
    • exception: yes/no can be listed horizontally
  • include a “None of the above” or “I do not know” option if they are valid because users cannot go back to having no option selected once they have selected one


  • change a radio button’s default size (32px on desktop and 36px on mobile, with a hit area of 48px for both)
  • pre-select radio buttons (users might miss the question or submit the wrong answer)

If you have any questions or feedback, please get in touch.