the glass bubble has great-looking imperfections in it. it is about 1 3/4" x 1 1/2". i put it on a 22 1/4" vintage looking brass chain. it sits right in the middle of the chest. i can shorten it if you like. just let me know.
i photographed this on a light box. it will show up a bit darker depending on what you wear underneath.
please let me know if you have questions.