Super Mario Cookie Cutters: Mario, Princess Peach, Mushroom, Fire Flower, Plant, Mystery Block SIZING: 4.5 and 3.1 in For print cookie cutters it is better to use PETG plastic. PETG is considered food-safe, meaning it doesn't leach harmful chemicals into food. PETG can withstand higher temperatures compared to PLA, which can soften and deform in warm environments like when used with hot cookie dough.