Each is coloured and marked to represent a different food group, so there's no room for mix-ups or bacterial cross-contamination. Made of strong, flexible plastic that's kind to knives. Once you've cut your food, you can fold the board for easy transfer to a pan. At 38 x 30 cm (15" x 12") they're nice and big, but because they're bendy, you can roll them up for storage or to fit in a dishwasher. A great way to help keep kitchens clean and hygienic, these chopping mats come with KitchenCraft's 12 month guarantee. KitchenCraft Set of 4 Flexible Cutting Mats in Green