For instructions, please follow the tutorial by clicking here. 

The River Section R11 is a single 12" piece of 3mm MDF along with sufficient end pieces to house DIAMETER 5MM magnets (not supplied)

The gap between the raised river banks is approximately 90mm with both banks 50mm wide. Total width at either end 190mm.The parallel sided 100mm wide "road" is centered and is 12 wide (approx 304mm) 

Please also see the R10 section where the road is 9" wide. 

The river can be expanded to include: Estuary, Tributaries and Streams which are also available on this website.