MILAN MARBLE EFFECT FLOOR AND WALL PORCELAIN STONEWARE TILES IN WHITE STRIPE. From an aesthetic point of view, Milan combines the unique nature of the veining with precious patterns and with a palette of colours that are in line with the neutral tones of Twelve50's ranges. White Stripe, a milky white, presents the Milan series in a contemporary design and an inimitable elegance. The industry standard is to include an extra 10% allowance for ‘wastage’.