Our DNA helix science keychain is a 3 dimensional tribute to the power of biology and genetics. It measures 2 inches in height and .75 inches in width. It is made from silver plated alloy metal in the United States. It hangs from a standard stainless steel key ring. It comes gift packaged in a nice box with a small card where you could write a cute note like-- Bless your gene pool, I would like to combine our genetics, or so glad I am part of your gene pool etc. We have it all ready to go for you to make your life easier.