OrangeLJ is right, 205 is the correct size for a 7".
Note: this isn't aimed at anyone, it's just my opinion: Stretching tyres is a silly trend, the only argument for it is that is looks good. Some people say the only way they can fit really wide wheels is to stretch the tyres on, but then you have to wonder: why would anyone try to fit wheels to a car that just don't physically fit? And the answer is that they think wide wheels look good. It's all about looks, I don't see why people try and argue otherwise, just admit it. I can agree that sometimes it does look good, but I hate seeing what Orange LJ was talking about when people say "it creates a stiffer sidewall" etc