From the update:
Acheson Creations announces the next in their line of 15mm Fortress Eurpoe Products Products – the 36-piece Boxed Trench Set, priced at 25.00USD (unpainted only).
This 15mm trench system can be set up in various configurations and can be used with any of the current WW1, WW2 and Futuristic gaming systems. Additional pieces can be purchased under our Fortress Europe category to expand the system to whatever needed.
Individual straight pieces are 4.5cm (1 3/4 inches) long and 1.5cm (~1/2 inch) tall. The configuration shown above size is 33.3cm x 33.3cm (13" x 13" inches).