Sizing
Width 
Utilities for setting the width of an element.
Quick reference 
| Class | Description | 
|---|---|
| w-auto | width: auto | 
| w-full | width: 100% | 
| w-screen | width: 100vw | 
| w-min | width: min-content | 
| w-max | width: max-content | 
| w-fit | width: fit-content | 
| w-{size} | width: {size} | 
| w-{fraction} | width: {fraction} | 
Available values
{size}:0,1,2,4,6,8,10,12,14,16,20,24,28,32,40,44,48,56,64,80,96,112,128,144{fraction}: Any fraction is valid - e.g.1/5
Basic usage 
Fixed widths 
Use w-{number} to set an element to a fixed width. Example w-32 = 3.2rem = 32px.
  <div class="w-128 ... "></div>
  <div class="w-64 ... "></div>
  <div class="w-32 ... "></div>
  <div class="w-16 ... "></div>
  <div class="w-8 ... "></div>
  <div class="w-4 ... "></div>
  <div class="w-2 ... "></div>Percentage widths 
Use w-{fraction} or w-full to set an element to a percentage based width.
<div class="flex ...">
  <div class="w-1/2 ...">w-1/2</div>
  <div class="w-1/2 ...">w-1/2</div>
</div>
<div class="flex ...">
  <div class="w-2/5 ...">w-2/5</div>
  <div class="w-3/5 ...">w-3/5</div>
</div>
<div class="flex ...">
  <div class="w-1/3 ...">w-1/3</div>
  <div class="w-2/3 ...">w-2/3</div>
</div>
<div class="flex ...">
  <div class="w-1/4 ...">w-1/4</div>
  <div class="w-3/4 ...">w-3/4</div>
</div>
<div class="flex ...">
  <div class="w-1/5 ...">w-1/5</div>
  <div class="w-4/5 ...">w-4/5</div>
</div>
<div class="flex ...">
  <div class="w-1/6 ...">w-1/6</div>
  <div class="w-5/6 ...">w-5/6</div>
</div>
  <div class="flex ...">
  <div class="w-full ...">w-full</div>
</div>Viewport width 
Use w-screen to make an element span the entire width of the viewport.
<div class="w-screen">
  <!-- ... -->
</div>Resetting the width 
The w-auto utility can be useful if you need to remove an element’s assigned width under a specific condition, like at a particular breakpoint:
<div class="w-full md:w-auto">
  <!-- ... -->
</div>Arbitrary values 
If you need to use a one-off width value, use square brackets to generate a property using any arbitrary value. Example: w-[256] generates width:25.6rem = 256px in most cases.
<div class="w-[256]">
  <!-- ... -->
</div>Applying conditionally 
Breakpoints and media queries 
You can also use variant modifiers to target media queries like responsive breakpoints, dark mode, prefers-reduced-motion, and more. For example, use md:w-full to apply the w-full utility at only medium screen sizes and above.
<div class="w-1/2 md:w-full">
  <!-- ... -->
</div>