XML SAPUI 5 CSS

Hallo zusammen,

ich can´t add my css Style to a numeric content with a class. I think the numeric content has it own class. How do I find it and overwrite it?

<mvc:View xmlns:mvc="sap.ui.core.mvc" xmlns="sap.m" controllerName="Warehouse-Monitor-.Warehouse-Monitor-.controller.WH" displayBlock="true">
	<?xml-stylesheet type="text/css" href="style.css"?>
	<GenericTile header="Anlieferungen" subheader="Nicht geprüft" frameType="TwoThirds"
		class="a" >
		<tileContent>
			<Kachelinhalt>
				<Inhalt>
					<NumericContent value="9" icon="sap-icon://outbound-delivery" width="200px" class="size" valueColor="Good" scale="Unites"/>
				</content>
			</TileContent>
		</tileContent>
	</GenericTile>

.Größe {
    
    Rand: 15px automatisch;

}