To find the range of tyres suited to your car, go to the Kwik Fit website and type in your registration. You don't have to purchase from Kwik Fit, but their website is very good and simple to use. Provided your car still has the original wheels, it comes up with a list of options, which then allows you to make an informed choice.
If you have changed the wheels, then the Kwik Fit website allows you to search by size, but you do obviously ned to check you are inputting the correct size information.