US: 18G Heavy Stud to United Kingdom Size 10mm Standard Hoop

US: 18G Heavy Stud: Features a post thickness of 1 $\text{mm}$ (0.0394 $\text{in}$), hoop inner diameter of 0 $\text{mm}$, gemstone carat equivalence of 0.75 ct - 1.00 ct, and earring style Stud / Gemstone.

United Kingdom Size 10mm Standard Hoop: Features a post thickness of 1 $\text{mm}$ (0.0394 $\text{in}$), hoop inner diameter of 10 $\text{mm}$, gemstone carat equivalence of N/A (Hoop), and earring style Hoop / Classic Fit.