You can buy the miles at Lowes. => it's just he mold... ONLY buy quickcrete or self leveling concrete. mix as instructed and when it's just about to set use a straight edge to push about 1/4 inch around the edge of every "stone" so you don't have sharp edges, when it's completely set up remove the mold and gentle tap the rough edges down with a hammer and then fill in cracks with "b" sand <= look for Quikrete On Amazon or Lowes.