Stewart Piazza Decorative Plastic Planter Granite Effect - Tall Round This is a quality Stewart Piazza heavy duty plastic patio planter with a dark granite effect finish - 35cm diameter, 50cm tall. FREE POSTAGE £22.95 Quantity: at £22.95 each Add To Basket A quality Stewart Piazza ornamental plastic planter. Made in the UK from heavy duty quality plastic. Dark granite effect colour. Size - 35cm diameter x 50cm high.