These solid bamboo lids are perfect for all your dry storage needs! They can be used both in the fridge, freezer or for dry storage. They have a food safe silicone seal to help keep air out. They measure 70mm Made to fit regular and wide mouth canning jars which includes many popular brand jams, nut butters, pasta sauce jars etc... *do not place in microwave or dishwasher Why buy a new glass jar when we have so many at our disposal? *jars not included