This cardboard box can be used for shipping via Nekopos, Click Post, Yu-Packet, standard mail (within specified dimensions), and Takkyubin 60 size. *This is a "Yakko-shiki" (envelope-style) box, which wraps the contents from all four sides.* Please note that there is a possibility of corner bends, dents, or wrinkles during delivery. Type: Yakko-shiki (envelope style) Size: Internal size: 223mm x 308mm x 26mm (thickness) External size: 225mm x 310mm x 29mm (thickness) Color: Brown This is a "Yakko-shiki" (envelope-style) box, which wraps the contents from all four sides. It's easy to work with due to the tape closure, and it's the most affordable among mailer cases, making it recommended for those who want to save on costs. <Supported Shipping Methods> Nekopos Yu-Packet Click Post Standard Mail Takkyubin 60 size Feel free to comment to negotiate the quantity. Sale Bonus ・When purchased on Monday/Wednesday/Friday/Saturday/Sunday If you purchase 40 to 59 sheets... +3 sheets If you purchase 60 to 99 sheets... +5 sheets If you purchase 100 to 149 sheets... +10 sheets If you purchase 150 to 199 sheets... +15 sheets If you purchase 200 to 249 sheets... +20 sheets *The day of the week the purchase is decided will be used to determine the bonus.*