series.holeSize Number

The radius of the donut hole in pixels.

The holeSize option is supported when series.type is set to "donut".

Example - set the donut chart hole size

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [
    {
      type: "donut",
      holeSize: 80,
      data: [1, 2, 3]
    }
  ]
});
</script>