Lug Size?

[dj short-e]

I have Tenzo-R GF7 Wheels on my car. I'm tryin' to get some RED anodized lugs for them but im not sure what size lugs i need. I know they are smaller than the stock ones because the gave me a KEY to get the lugz off. I don't wanna order the lugz (which are from RAYS) and have them be the wrong size. I'm sure this is a dumb question and has a very easy answer.. but those are always the ones i can't answer myself. haha..

Anyways, can anyone help with this?