<div class="container" id="container">
<div class="item one">1</div>
<div class="item two">2</div>
<div class="item three">3</div>
<div class="item four">4</div>
<div class="item five">5</div>
</div>
body {
background-color: #F5F5F5;
color: #555;
font-size: 1.1em;
font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}
.container {
margin: 30px auto;
max-width: 800px;
padding: 20px;
-webkit-display: -webkit-box;
-webkit-display: -webkit-flex;
display: -webkit-box;
display: -ms-flexbox;
display: flex;
background-color: #594255;
}
.item {
background-color: #fff;
height: 100px;
margin: 1%;
text-align: center;
line-height: 100px;
font-weight: bold;
font-family: sans-serif;
font-size: 5em;
color: #594255;
/* START HERE */
-webkit-flex: 0 1 100px;
-webkit-box-flex: 0;
-ms-flex: 0 1 100px;
flex: 0 1 100px;
}
.one {
/* flex: ; */
}
.two {
/* flex: ; */
}
.three {
/* flex: ; */
}
.four {
/* flex: ; */
}
.five {
/* flex: ; */
}