This is a letter set from Kyowa. It's a set of postcard sheets and envelopes. The pattern on this set is a twill weave of the "yagasuri" (arrow feather) design. Postcard Sheets: 45 sheets, 1 design Envelopes: 10 envelopes, 1 design The envelopes are size No. 2 Western-style (standard postal size). The postcard sheets are postcard size. *Please note that the postcard sheets are not postcards and cannot be mailed individually. Although unused, this item has been stored at home. Please understand that it is not a perfect new item. You can purchase it immediately.