This roadbed is designed with a more realistic 30-degree slopes found in many  actual  railroad roadbeds.  The scale dimensions are 18" high, 14'-'5" across the top and 19.25" across the bottom.  Actual dimensions are  3.2 mm thick (approx. 1/8"),  7/8"across the top,  1-3/16" across the bottom and 32" long.  Minimum radius for the bendable products is 11".  Roadbed is sold in 8' bundles.  You receive a bundle of 3 strips, 32" long for each 8' of roadbed ordered.  This is a single piece of roadbed,  so 3 pieces make 96" or 8' of roadbed.  This roadbed is designed so that laying it side to side will yield 1-3/16" track centers.