<form>
  <div class="form-select">
    <select name="select" class="select" id="abc">
      <option value="">選択してください</option>
      <option value="1" data-other="false">コビトカバ</option>
      <option value="2" data-other="false">セスジキノボリカンガルー</option>
      <option value="3" data-other="false">フェネック</option>
      <option value="4" data-other="false">バビルサ</option>
      <option value="5" data-other="false">マヌルネコ</option>
    </select>
  </div>
</form>
/* reset */
input,label,select,button,textarea{
  -webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;
	margin:0;
	border:0;
	padding:0;
	display:inline-block;
	vertical-align:middle;
	white-space:normal;
	background:none;
}
input:focus,
select:focus,
textarea:focus{outline:0;}

.form-select {
  position: relative;
  display: inline-block;
	width: 250px;
  height: 50px;
}
.form-select::before {
  position: absolute;
  display: inline-block;
  pointer-events: none;
  top: calc(50% - 6px);
  right: 16px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 12px 6px 0 6px;
  border-color: #999 transparent transparent transparent;
  content: '';
}
.form-select .select {
  padding-left: 12px;
  width: 100%;
  height: 54px;
  background-color: #f2f2f2;
  border: 2px solid #c9c9c9;
  border-radius: 6px;
  cursor: pointer;
  font-size: 16px;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.