You are buying N scale truss style bridge with 2 sections
 
The truss bridge top section is 130 mm long 40mm wide and 41mm high
With legs it is 85mm high
 
N scale. 

This kit contains 2 truss bridge sections and 3 leg sections.
 
The Bridge is laser cut from 3mm MDF 
Paint it and it will be just like the real thing.
Comes with step by step building instructions!
 
Buildings are very easy to put together with some PVA glue or any other kind of wood glue. Super glue is also suitable to use.