These are such pretty costume jewelry earrings, probably 60's or early 70's, when pierced earrings were new and all the rage.
Still on original card, which says: 14kt G.F. (gold filled) EAR WIRE, with a crown and "C" logo. The back of the card is stamped "Made in Hong Kong".
I have many different styles of these earrings! These measure 1 & 5/8 inches, not including wires.
These are a pale pink color, very pretty.