height Number(default: 200)

The height of the suggestion popup in pixels. The default value is 200 pixels.

Example - set the height

<input id="dropdownlist" />
<script>
$("#dropdownlist").kendoDropDownList({
  dataTextField: "ProductName",
  dataValueField: "ProductID",
  height: 500,
  dataSource: {
    transport: {
      read: {
        dataType: "jsonp",
        url: "//demos.telerik.com/kendo-ui/service/Products",
      }
    }
  }
});
</script>