See photos , sides for an arch bridge aprox 65" long , 14 inches high , could be trimmed at joints to fit smaller opening and make the legs thinner . 2 sets $75ea plus shipping . One set consist 4 pieces as illustrated one piece is cut in the middle on each side .
Made from Sintra sign plastic .500 thick , easy to work with , this is the hard part , the rest is easy for a good modeler , put on your own trim , make the legs longer for a taller span , over lay trim how ever you like . I paid way more than this for them .