Design: Swamp Design 001 Size: 36" tall x 36" wide Material: Commercial Grade Artist Canvas 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. The scale for our maps is 28mm, the most common scale, but of course if a map looks suitable for your unique scale there's no reason you can't use it.