width59.html

<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>width: 59px</title>
<meta name="viewport" content="width=device-width">
<style>
.flex {
  display: flex;
  flex-wrap: wrap;
  width: 118px;
}
.item {
}
.ib {
  display: inline-block;
  width: 59px;
  height: 59px;
  background-color: lightgray;
}
</style>
</head>
<body>
<h1>width: 59px</h1>

<div class="flex">
  <div class="item">
    <div class="ib"></div>
  </div>
  <div class="item">
    <div class="ib"></div>
  </div>
</div>

</body>
</html>