Our medium-sized Wilko Zip Seal Food and Freezer Bags store all types of food in the fridge or freezer. Labelling them is easy, thanks to the food bags' write-on panels. When freezing food, ensure all the air from each small zip-lock bag has been expelled; to prevent the bag from splitting, never overfill. Always allow food to cool fully before transferring to the food storage bags. Keep the bags away from babies, small children and pets. Not suitable for use in conventional or microwave ovens. Each zip-seal food and freezer bag measures 26cm-square.