These are pull-up type diapers (made in Japan). (Adult diapers) Waist size: 65cm - 90cm M size, 20 pieces per pack (unisex) To use, you will need to attach (install) absorbent pads designed for these diapers, which are sold separately. These pads are available at supermarkets, drugstores, pharmacies, discount stores, etc. If you have any questions, please ask at the store.