NO. Spriing arch supports should NOT be cut. They come in 8 sizes (Womens 6 - 13/Mens 5 - 12), and they are designed to fit in most types of shoes. The correct size should be selected in the first place. If you are a smaller size (e.g. Women’s 5, please let us know you are interested and we will let you know once the size becomes available).  Spriing shells are made from recyclable PP (plastic) and cannot be cut. The short covers are made to fit the shells exactly. So there is no need to cut them down. The long covers come in precise half sizes to fit your shoes as well as the shells. Again, the correct size should be selected in the first place so there is no need to cut them down.