This was a gift, and I'm selling it because I used it a bit and then didn't use it for about a year. I'm sorry, but I threw away the box, case, and drawstring bag. It's made of silver 925, and the clasp is stamped with "GUCCI" and "silver 925." I couldn't take a picture of the silver 925 stamp because the letters were too small. The size is approximately 46cm in total length, measured by a layman. I understand that this is a product where a new necklace chain from a different product was attached to a Gucci GG design charm.