Contains 39 sheets! These are white cardboard boxes suitable for mailing within standard postal size limits, and for Yu-Packet and Click Post shipping. Please note that there is a possibility of corner bends, dents, or wrinkles during delivery. Internal dimensions: Approximately 134mm x 82mm x 24mm External dimensions: Approximately 143mm x 93mm x 28mm Total external dimensions (3 sides): Approximately 27cm Weight: Approximately 23g The cardboard boxes will be shipped unassembled.