One pair of antique silver lock and key earrings.
Keys and locks measure 23 mm and earrings are 45 mm top to bottom.

Also check out the matched pairs of keys and locks:
Keys: https://www.etsy.com/listing/191183215/antique-beaded-silver-key-earrings?
Locks: https://www.etsy.com/listing/191184365/antique-beaded-lock-earrings?