Description Shipping & Returns Reviews Description Size: 20×30 cm. Quantity: 10 per pack. These sheets have a glossy surface. When heated in an ordinary oven the plastic shrinks up to 40% in size. Can be decorated with permanent markers. Remember to remove the protective film before use. Can be decorated with solid markers on the glossy side e.g. Uniposca, Skrib and Plus Color Markers, as well as glass and porcelain markers. Shipping & Returns Reviews