NYS Bluestone pattern flagging is used for patios and walkways. It comes with a natural cleft top. We offer 1" or 1½" thickness (this is not gauged material, so thickness is nominal). Sizes Range from 1'0" x 1'0" up to 3'0" x 3'0" increasing in 6" increments. Each Piece allows for a ½" joint. Color varies by piece.