Rim Issues

[Daboss]

Hey guys I was just wondering if I could ask for a little help. I am looking into buying rims for my 95 r33 gtst but I have very little experience in doing so. The guy to the store told me to come back with offset and rim dimensions so he can help me but I dont know what he was talking about. I saw a set of racing rims that I wanted and this is what I got from them they are 18 by 7.5 5-100/114.3 -40-bk with tires with the following numbers 235/40/18 I want to know if these will fit my car and also whats the offset on them and if the will look wider than the stock rims as thats the kind of look I am going for a wider look doesnt have to be extremly wide just noticabley different. thanks all help is appreciated.