Tile icon style

Hi,

I'd like to make the icon from a sap.m.StandardTile larger.

I use this code to include my stylesheet:

jQuery.sap.includeStyleSheet("css/standardtile.css" , "tilestyle");

And I use this code to add it to my element:

tileContainer.addTile(new sap.m.StandardTile({  icon : "images/green-plus.png",  title : "Add new Ticket",  number: ""  }).addStyleClass("style"));

However, I dont know what code I should write in my css file. I tried to find the styleclass using developer tools, but it seems like the height and width (...rem) are not defined in a specific style class. Anyways, I have no experience with css so I'm probably wrong.

Thanks for any help

RW