3 "Genuine Lucite" white plastic brooch pins.  Each one features a locking mechanism.  All of them are in very good condition: 

Rounded-Bottom Triangle
About 2 3/4 inches long and 2 inches wide.

Oval
About 2 inches long and 1 1/2 inches wide.  Includes the original holder.

Diamond
 2 1/2 inches long and 1 3/4 inches wide.  The locking mechanism is loose.