<input type="text" class="placehoder-custom" placeholder="Please enter user name to search">
<input type="text" placeholder="Please enter user name to search">

* {
  margin: 0;
  padding: 0;
}

input {
  width: 300px;
  height: 30px;
  border: none;
  outline: none;
  display: block;
  margin: 15px;
  border: solid 1px #dee0e9;
  padding: 0 15px;
  border-radius: 15px;
}
/* Key Style */
.placehoder-custom::-webkit-input-placeholder {
  color: #babbc1;
  font-size: 12px;
}