Components › Utilities


Sizing utilities allow for easy width sizing on an element.

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<div class="slds-size--1-of-2">
  <div class="slds-box slds-box--x-small slds-text-align--center slds-m-around--x-small">.slds-size--1-of-2</div>
<div class="slds-size--1-of-2">
  <div class="slds-box slds-box--x-small slds-text-align--center slds-m-around--x-small">.slds-size--1-of-2</div>
<div class="slds-size--2-of-2">
  <div class="slds-box slds-box--x-small slds-text-align--center slds-m-around--x-small">.slds-size--2-of-2</div>

Note: The <div> with class slds-box is for demo purposes only.

Component Overview

Our sizing class names are set up in a human-readable format, e.g. .slds-size--1-of-2. This equates to a width of 50%.

By default, a group of sizing helpers are created based on standard grid column spans of – 2, 3, 4, 5, 6, 7, 8 and 12. For example, if you need 3 cards to horizontally align along the same x-axis, you would use the class .slds-size--1-of-3 on each element. This will make each card take up 33.333% of containing section.

Our sizing helpers have the option to be responsive. By pre-pending a breakpoint name to a sizing helper, e.g. .slds-medium-size--1-of-3 you will output a width at the specified breakpoint name.

Absolute sizing helpers are also available (where widths are declared in rem units): xx-small, x-small, medium, large, x-large and xx-large as defined in the sizing category of the Design Tokens. e.g. .slds-size--large

In some uncommon cases, you may need a sizing helper that is up to a certain breakpoint. For these, use the classes prefixed with max- to achieve this result.

Here is an overview of our available breakpoint names:

Breakpoint NameBreakpoint Width
small-30em / 480px and higher
medium-48em / 768px and higher
large-64em / 1024px and higher
max-small-up to 29.9375em / 479px
max-medium-up to 47.9375em / 767px
max-large-up to 63.9375em / 1023px

Our responsive sizing helpers are built upon a mobile first approach. To achieve the desired outcome of this approach, you will need to append responsive sizing helpers to an element that overrides the previous breakpoint. A default sizing helper is required and responsive sizing helpers are additive. The following example demonstrates the class name position for each breakpoint:

<div class="[default] [small size override] [medium size override] [large size override]">

A real world example would look like this:

<div class="slds-size--1-of-2 slds-small-size--1-of-3 slds-medium-size--1-of-4 slds-large-size--1-of-3">

This will equate to the following width output for your element:

.foo {
  width: 50%;
  @media only screen and (min-width: 30em) {
    width: 33.3333%;
  @media only screen and (min-width: 48em) {
    width: 25%;
  @media only screen and (min-width: 64em) {
    width: 33.3333%;

See Grid System for more information and examples.