Hi Thomas,
Thanks for using Syncfusion products.
To override the default CellSize, you can use the following code.
dataGrid.Model.RowHeights.DefaultLineSize = 25;
foreach (var visibleColumn in dataGrid.VisibleColumns)
{
visibleColumn.Width = 60;
}
Please download the workaround sample in the following location.
http://www.syncfusion.com/uploads/redirect.aspx?file=GDCCellSize_6b87264d.zip&team=developmentLet us know if you need any more details.
Thanks
Ganesan