## flex-basis

Controls the initial size of the flex item

Example 4.6 - Flex - Example 4.6
<div id="f4container"><div class="box box1">1</div><div class="box box2">2</div><div class="box box3">3</div></div>#f4container { display: flex; } .box1 { flex-basis: 15%; background-color: lightpink; } .box2 { flex-basis: 25%; background-color: lightsteelblue; } .box3 { flex-basis: 50%; background-color: wheat; } .box { padding: 2em; border: medium solid black; width: 3em; }

- Markup
- Style
- Display

     <div id="f4container">
       <div class="box box1">1
       </div>
       <div class="box box2">2
       </div>
       <div class="box box3">3
       </div>
     </div>

In `style` element (`<style>`) within `head` element:

    #f4container {
      display: flex;
    }
    .box1 {
      flex-basis: 15%;
      background-color: lightpink;
    }
    .box2 {
      flex-basis: 25%;
      background-color: lightsteelblue;
    }
    .box3 {
      flex-basis: 50%;
      background-color: wheat;
    }
    .box {
      padding: 2em;
      border: medium solid black;
      width: 3em;
    }