The main body is not included. This is an item to add height. Cannot be used alone. I entered 24 as the size because it was required for the listing, but there is no main body, only something to add height, so there is no size. I am selling heel lift insoles made of shock-absorbing material that reduce the burden on your feet and support comfortable walking. It allows for height adjustment and customization to your preferred height, but I am not using them.