Very interesting question, but you need to give far more information
Colour, black is popular but there are other options
Decoration, do you want white lettering and should it be on the inside or outside
Shape, again round is favourite but rather unimaginative
Do want to use them off road
Do you want to look as though you use them off road
Do you want them fitting or left in a heap on your drive by a courier
Would you like to go round corners in the wet forwards or sideways
Do you need the car to stop or are you happy to drive over the car in front
And most important - does size really matter



