Look on the tyre sidewall for a size format such as width, profile and rim diameter. If you are unsure, use the registration search or check the vehicle handbook.
Not always. Some vehicles run different sizes between axles, so check both the front and rear tyres (or your vehicle details) before ordering to ensure you buy the correct set.
After choosing your tyres, select a nearby fitting partner, pick an appointment slot and place your order. The tyres are sent to the garage, and you attend the booking for fitting.
Tyres should have at least 1.6mm tread depth across the central three-quarters of the tread around the full circumference, with no dangerous damage such as bulges, cuts or exposed cords.