Presently in Frostgrave I am running an Elementalist warband that I rolled randomly, not a very clever idea i'll grant you, one of the spells I got was Wall.
So I decided that I should create 3 walls for use in game. They are made from packing box card and covered in sand and with the marks created using PVAcrete, so unless sat on by a troll should be quite hard wearing.
Each one is 6" by 3" as described in the rule book, but I tried to add a little something to make them stand out.
See if you can guess which is my least favourite.