Cobalt sc

Hey guys hoping some one can answer this. Have searched all over the internet and hear and see different things all the time. I’m sure it’s been answered on here as well but here goes...
Can anyone tell me what the stock wheel specs are for a 07 cobalt ss sc?
I know there 18 inch but not sure if there 7.5 wide or not?? And what’s the offset?
Thank you all !