Like Voltermore, I have used these plastic/rubber type boot mats similar to those as advertised on his Ebay link (also available on Amazon) in several versions of the Honda Jazz, including the Crosstar. They are very easy to trim and only need trimming around some edges. Its also possible to let the edges ride up around the sides and back of the boot a few centimetres if you wish to avoid liquids,sand etc getting through to the carpet.They look good, are easy to clean, and very long lasting ( I have one of them which is more than 10 years old). They are very flexible making it easy to get to underfloor storage. I would certainly recommend them as an alternative to the Honda one.