Both sides are completely blank. Set of 50! No extra elements like postal code boxes are printed. How about for postcards, POPs, QSL printing for ham radio, direct mail, POPs, etc.? ⭐︎ Size: 100mm x 148mm (Japanese postcard size) Thickness: 0.18mm per sheet The thickness is slightly thinner than official postcards. (Weight per sheet: approx. 2.3g) Uses 135kg high-quality domestic paper (Shirokuban). Mailable: Recommended for those who want to reduce paper costs♪ Printing is possible with home inkjet printers. Since it is not inkjet processed, printing is also possible with laser printers. Please consult about the number of sheets♪ We apologize if there are any oversights due to amateur inspection. #realiser Postcard Blank Both Sides Blank DM POP Thank You Note White