Light Mountain Dry stack Concrete Stamp set from Stone Edge Surfaces. The Light Mountain Drystack concrete stamp set is in our wall drystack stamp family and comes as a set of 5 stamps…3 stamps are the main pattern, are easy to use with each stamp having two handles for easy application control. Each stamp is approximately 12′ x 24″ in size and are meant to be rotated 180 degrees to double the pattern, so 3 stamps can give 6 looks. The other 2 stamps are small finishing stamps (approximately 4″ x 10″ in size) and are used for creating random stones, getting into tight spaces where the big stamps will not fit, and finish work. For best results, always rotate the order of the 3 stamps so you do not create a predictable pattern.