United Kingdom Size 18G Standard Stud to US: 20G Delicate Stud

United Kingdom Size 18G Standard Stud: Features a post thickness of 1 $\text{mm}$ (0.0394 $\text{in}$), hoop inner diameter of 0 $\text{mm}$, drop length of 6.5 $\text{mm}$, gemstone carat equivalence of 0.50 ct - 1.00 ct, and earring style Stud / Solitaire.

US: 20G Delicate Stud: Features a post thickness of 0.8 $\text{mm}$ (0.0315 $\text{in}$), hoop inner diameter of 0 $\text{mm}$, drop length of 5 $\text{mm}$, gemstone carat equivalence of 0.10 ct - 0.25 ct, and earring style Stud / Minimalist.