For those that is interested and too lazy to go out and measure yourself. It is roughly 40x45inch so a 4x5ft vinyl should do the job.
My question now is has anyone work on the 2015 model with the already installed OEM shark fin? I'm a little hesitant to take it off and finding ways to put it back straight.
I was wondering also if underneath would be the same type of antenna and the shark fin is just an add on.
Thanks
Update found this about OEM 2015 shark fin. Looks like it is all screw in without double sided tape. So the job of roof wrapping should be much easier. Props goes to Kbye for his post.
http://www.ft86club.com/forums/showthread.php?t=76922