De Stijl's sixth volume was published in landscape format. It had changed from the original format (245 x 185mm) in its fourth year, with new typography and logo. The design by Mondrian and Van Doesburg became De Stijl's international face. This cover of No. 12 is asymmetrically balanced, which was key to neo-plasticism. Its type is limited to rectangular blocks or distributed in vertical and horizontal lines. By 1924, when it was published, Van Doesburg had declared the diagonal to be a more dynamic compositional principle, calling this new realization elementarism.