Sterling Silver CZ Butterfly with Chain French Earring Hook. The Butterfly Is Also a Pinch Bail for Attaching Beads or Other Components.
 
Size of Hook: Approx. 15 x 16mm 
Thickness of Hook:  Approx. 0.6mm 
Length of Chain: 20mm
 
Quantity: 2pcs (1 pair) per pack
Weight:  Approx. 1.49g per pack
 
Note:
The height of the earring hook is measured from the top of the hook (where it would go through the ear piercing) to the bottom of the loop that will hold the earring. 
 
The length is measured from the top of the hook to the end of the hook behind the ear piercing.