Kyowa letter set. This is a set of postcard sheets and envelopes. The design is Ayatori Shippo (twill weave Shippo). Postcard sheets: 45 sheets, 1 design Envelopes: 10 sheets, 1 design The envelopes are size Yo-kei 2 (standard postal size). The postcard sheets are postcard size. *Please note that the postcard sheets are not postcards and cannot be mailed individually. Unused, but stored at home. Please understand that this is not a perfect new item. You can purchase it immediately.