This is pair a of vintage Trifari clip earrings that have a white thermo plastic top with tiny silver-tone studs as decoration highlights.  The backing is a silver-tone flat plate.  
They measured almost 1-1/4 inch in diameter.  
They are signed TRIFARI on the clips.  
Some makeup or other stuff makes them less than perfect.  They might clean up.
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Vintage Trifari Fashion Earrings Snow White, Silver-Tone Thermo Clips listed in:
          
            All Vintage Jewelry
            , Vintage Earrings, Vintage Designer Signed