A9 paper size in feet

What is A9 paper size in feet ?

A9 size in feet is 0.1214x0.1706

The aspect ratio of an A9 paper is 1:1.41,The area of an A9 paper is 1924 mm², Perimeter of an A9 paper is 178 mm or 0.58384 feet, Diagonal line of an A9 paper is 63.82 mm or 0.2093296 feet

Feet - In English-speaking countries, various ancient and modern units of length measurement based on the length of the human foot.1 foot= 0.0001893 miles=12 inches = 30.48 centimeters=0.3048 meters= 0.33333 yard