I found these while cleaning out my parents' house. I believe they are quite old. The lids don't seem to have been used much, but they are used, so please understand. They have been stored away for a long time. I have washed them for this listing. Please understand that they have been stored at home. Small lid: Approximately 17cm in diameter Inner diameter of the lid (underside): Approximately 15.5cm Large lid: Approximately 19.5cm in diameter Inner diameter of the lid (underside): Approximately 17.5cm (Please allow for some error as these measurements are approximate.)