Boulders usualy range from 2 to 5 feet. A 3'x3'x2' boulder typically weighs 1 ton or 2000 Lbs. A 2' diameter boulder weighs about 750 Lbs. Figure half that weight for lava boulders. Note: Coverage for Granite boulders= 168 lb. per cu. ft. Granite Boulders $.03/ LB Lava Accent Boulders $.18/ LB Moss Rock Boulders $.09/ LB Moon Rock $0.12/ LB Red Rock Slabs $.02/ LB Rocky Mountain Red Boulders $.02/ LB Please call 719-473-3100 to order.