Hi Sunray
http://www.clubsiku.co.nz/index.php?page=Catalogue
The trams are under the blister part of the catalogue 1011 is a small tram on the first page and 1165 is a larger one on the second page.
I will try and get measurements next time I'm in a shop with them.
Regards
Sean

Sean

Many thanks for taking the trouble to post this.  I see I the Siku tram 1011 advertised at £3 on toyshop websites and described as 1/120 scale. 
That's good value for a game prop, and at 8x2x3cm is Ok table size.  The cheaper the props, the more left to spend on figures.   

Cheers mate.

I have the coal-related mini and, while it takes a bit of working out to get the metal bits aligned to the resin body, it's very nice.