US: 10mm Standard Hoop to United Kingdom Size 12mm Statement Hoop

US: 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.

United Kingdom Size 12mm Statement Hoop: Features a post thickness of 1.2 $\text{mm}$ (0.0472 $\text{in}$), hoop inner diameter of 12 $\text{mm}$, gemstone carat equivalence of N/A (Hoop), and earring style Hoop / Bold Fit.