This roadbed is reminiscent of the traditional 45-degree slopes found in most commercial model railroad roadbeds.   The scale dimensions are  18" high, 14" across the top and 17.5" across the bottom.  Actual dimensions are  7 mm thick (approx. 9/32"), 4.8 cm across the top (approx. 1-15/32" ), 6.1 cm across the bottom (2-3/8") and 32" long.  Minimum radius for the bendable products is 28".  Roadbed is sold in 8' bundles.  You receive a bundle of 6 strips, 32" long for each 8' of roadbed ordered.  Roadbed is in halves, so 6 pieces make 96" or 8' of roadbed.  This roadbed is designed so that laying it side to side will yield 2-3/8" track centers.  

S Scale Roadbed, 5mm mainline, 45-degree shoulders