Instant purchase is OK. Price negotiation is OK. Size: Approximately 28cm wide x 50cm long. This is a light blue transparent cover for a school backpack (randoseru). It has been opened once to check the size. The original box has the price tag on it, so it will be packaged in a different box. As I am a student, it may take some time to ship the item after purchase. I will try to ship it as soon as possible, but please understand this before purchasing. If you have any questions, please feel free to ask.