The current workaround is to set the FontSize of the underlying RadComboBox explicitly: <Style x:Key="RedCellStyleStyle" TargetType="telerik:GridViewCell" > <Setter Property="FontSize" Value="25" /> <!--workaround--> <Style.Resources> <Style TargetType="telerik:RadComboBox"> <Setter Property="FontSize" Value="25" /> </Style> </Style.Resources> </Style>
The fix for this issue will be available in the next LIB version (2018.2.820). It will also be included in our official version – R3 2018, scheduled for the mid of September.