Series.MarkerSize Property (Excel)
Returns or sets the data-marker size, in points. Can be a value from 2 through 72. Read/write Long.
Syntax
expression .MarkerSize
expression A variable that represents a Series object.
Example
This example sets the data-marker size for all data markers on series one.
Worksheets(1).ChartObjects(1).Chart _
.SeriesCollection(1).MarkerSize = 10