United Kingdom Size Super to US: Ultra

United Kingdom Size Super: Corresponds to a Syngina fluid capacity range of 9–12 $\text{g}$, FDA absorbency tier of Super Absorbency (9 to 12g), EDANA classification Super / Heavy (9 to 12g), physical dry dimensions of 50 $\text{mm}$ length $\text{x}$ 15 $\text{mm}$ dia., recommended flow Moderate to Heavy Flow, and format type Digital / Expandable Applicator.

US: Ultra: Corresponds to a Syngina fluid capacity range of 15–18 $\text{g}$, FDA absorbency tier of Ultra Absorbency (15 to 18g), EDANA classification Ultra / Maximum (15 to 18g), physical dry dimensions of 55 $\text{mm}$ length $\text{x}$ 18 $\text{mm}$ dia., recommended flow Very Heavy Flow / Overnight Protection, and format type Digital / High-Density Core Applicator.