Hi aussietruckerguy,
I have to admit that you shocked me a bit with your posting.
The sleekline page says that the minimum size is 16 inches, which is about 40cm or about 3cm in my case.
As I didn´t take a photo back then I found a sleeper looking quite similiar to the one.
http://www.trucksales.com.au/buy/det...d=1348DE96CA61
I remember having a look into a small Kenworth T608 bunk and it was far smaller than a european one. It is really small no doubt and I´d prefer a comfy seet over the sleeper