Fondant Shaping Foam by Wilton. Thick and thin squares are the ideal soft surface for shaping flowers, leaves and other fondant or gum paste cutouts. Use the thin square for thinning petal edges with a ball tool, carving veins on leaves and making ruffled fondant strips. Use the thick square for cupping flower centers. Thin: 4x4x1/8 inch; Thick: 4x4x1 inch.