series.sizeNumber
The size (or radius) of the series in pixels. If not specified, the available space is split evenly between the series.
Available for only.
Example
<div id="sparkline"></div>
<script>
$("#sparkline").kendoSparkline({
type: "pie",
series: [{
data: [10, 15, 8, 12],
size: 150
}]
});
</script>
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