<!DOCTYPE html>
<style>
div {
  width: 100px;
  background: blue;
}

inline-block {
  display: inline-block;
  width: 80px;
  height: 1em;
  background: orange;
}
</style>
</head>
<body>
  <div>
    <inline-block></inline-block><br>
    <inline-block></inline-block><br>
    <inline-block></inline-block><br>
    <inline-block></inline-block><br>
    <inline-block></inline-block>
  </div>
</body>
