innerSize property
dynamic
innerSize
getter/setter pair
The size of the inner diameter for the pie. A size greater than 0 renders a donut chart. Can be a percentage or pixel value. Percentages are relative to the pie size. Pixel values are given as integers. Setting overridden by thickness.
Note: in Highcharts < 4.1.2, the percentage was relative to the plot area, not the pie size.
API Docs: https://api.highcharts.com/highcharts/series.variablepie.innerSize
Implementation
dynamic innerSize;