Silly question, but... size of the Outback decal?

I belong to an organisation and wanted to put the decal on my (soon to be delivered, I hope!) T@B for a little personalisation.  

I think the best place for it will be where the Outback decal typically is put on the Outback models.  Can someone with an Outback that might have a measuring tape handy report back the approximate dimensions for me?  That should really help me decide on the size to order.

Silly thing to do a forum post about, but since they take a few weeks to get made, any help to get it started would be greatly appreciated!