Hexagon nut stud earring.
Stainless steel nuts soldered on a sterling silver post.
The earrings comes in 4 different sizes(Pic 5) :
Approx. 4mm width.
Approx. 5mm width.
Approx. 6mm width.
Approx. 7mm width.
 
A pair of earrings.
If you want just one, Use coupon code SingleStud for 50% discount, or, you can buy a mixed pair of any of the studs here :
https://www.galbarash.com/product-page/mixed-pair-of-studs-a
Unisex.