Any idea what size the lug nuts are on a 2016 GS350 F-Sport?

 

They're M12x1.5

 

I should have asked a better question.
What size socket is needed to remove the lug nuts?

 

21mm, if memory serves me correctly

 

Is 21mm the same as 13/16? I have a 13/16 that seems to fit OK but I do not have a 21mm.

 

I'd find a 21mm just in case. Yes, I've used a 13/16 socket but only after I loosened the lug nuts with the 21. My 21mm is 1/2 drive and stays on the large torque wrench. So I break the bolts loose (with the 21), then I use my Ryobi impact driver with the 13/16 (3/8" drive) to back out the lug nuts all the way.

If I am reading Google correctly, 13/16" is 20.6375mm. It would probably work but just the fact that it is for the lug nuts would make me NOT want to take any chances. Heave forbid you round the edges of one of the nuts while tightening it. I can only imagine it would be a real PITA to get removed.