|          [ONE]             [TWO]            |

|  [ONE]  |
|  [TWO]  |

.evenly-space {
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: space-around;
  justify-content: space-around;
}

<div class="evenly-space">
  <div style="width:200px;border:1px solid black">ONE</div>
  <div style="width:200px;border:1px solid black">TWO</div>
</div>