ZAD- Literary Quote Key Post Earrings. The famous quote, "Where one door shuts, another opens" inspired this delicate pair of vintage key post earrings. The gold key stud earrings are displayed on a vintage parchment card printed with Miguel de Cervantes' legendary quote from Don Quixote. • Made in China • Gold key post earring makes a great gift for lovers of classic literature • Measurements (approx.) 3/8" posts • Materials Gold-tone Metal, Surgical Steel Post