United Kingdom Size 0G Plug / Tunnel (8mm) to US: 20G Standard Stud

United Kingdom Size 0G Plug / Tunnel (8mm): Features a post thickness of 8 $\text{mm}$ (0.315 $\text{in}$), hoop inner diameter of 0 $\text{mm}$, gemstone carat equivalence of N/A (Plug), and earring style Plug / Stretched Lobe.

US: 20G Standard Stud: Features a post thickness of 0.8 $\text{mm}$ (0.0315 $\text{in}$), hoop inner diameter of 0 $\text{mm}$, gemstone carat equivalence of 0.25 ct - 0.50 ct, and earring style Stud / Minimalist.