diff --git a/types/highcharts/index.d.ts b/types/highcharts/index.d.ts
index 3ce85ed9e2..f7f3759432 100644
--- a/types/highcharts/index.d.ts
+++ b/types/highcharts/index.d.ts
@@ -5266,6 +5266,9 @@ declare namespace Highcharts {
         * interfaces (AreaChartSeriesOptions, LineChartSeriesOptions, etc.)
         */
     interface IndividualSeriesOptions {
+        size?: number | string;
+        innerSize?: number | string;
+
         type?: string;
         /**
          * The main color or the series. In line type series it applies to the line and the point markers unless otherwise