Slants are a mid-ground between an upright, and a pillow type. The front face is pitched at a steep angle, and the back is vertical. They can either be installed directly onto the concrete foundation, or atop of a base. Most average ending up around 18" in height without a base. One distinct attribute to a slant monument is it's inherent stability, it's virtually impossible to tip a slant style without a distinct human effort to do so.