Design: Stormy Indigo Sea Size: 36" tall x 36" wide Material: Premium Artist Canvas - a heavyweight water-resistant, poly/cotton blend canvas. This is the same canvas used for fine art prints found in galleries around the world. It feels good, lays down nice and looks classy. About Ravenwood Game's Battle Mats We don?t just work ? sometimes we play and when we do its old school tabletop games. With a long history of gaming back to the 1980s we've picked up some insight into what makes a good map and we incorporate it into all our Battle Mats.