- S = Citroen C2, Ford Fiesta, VW Polo
- M = Audi A3, Ford Focus, VW Golf
- L = BMW 3 Series, Ford Mondeo, VW Passat
- XL = Audi A5, BMW 6 Series, Citroen C5
- XXL = Audi A6, BMW 5 Series, Merc E-Class
Please note that these should be used as a guide only.
Not suitable for mohair soft-top vehicles.