The Prairie Ledge 12″ Milled boulders are meticulously processed dolomitic limestone boulders with a uniform height of 12″. Featuring a smooth and efficient stacking process, these boulders have flat tops and bottoms and come in neutral, earthy colors of brown, buff, and tan faces with tan to gray tops. Created to achieve a “coursed” appearance with very little variation, these boulders offer efficient coverage of 7.5 face feet per ton and are available in depths ranging from 18″ to 24″ and lengths from 36″ to 84″.