Thank you for viewing. The size is approximately 5.5 cm in length. The third photo shows the back side. I purchased this from another flea market site, where it was sold as an antique key, but I believe it is relatively new. I do not know which country it is from. I believe it is all made of iron. There is deterioration and dirt from the time of purchase. I will ship it using an OPP bag and bubble wrap via Yu-packet Post Mini.