Instant purchase is welcome. You can buy without leaving a comment. The cards are pocket-sized (10cm x 6cm), making them easy to store and use. As this is an overseas product, there may be scratches or dents on the box, but this does not affect the contents. If there is an issue with the contents, please contact us before rating the product. Instructions and QR codes are not included, nor is there any guidance on how to use the product.