Marble square ruler 90 degree vertical square gauge granite measuring square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square square