According to the Flag Rules of the People's Republic of Bangladesh , 1972, the exact details of the size of the national flag are as follows: The red circle will have a radius of one-fifth of the length of the flag. The center point of the circle will be at the point of intersection of the vertical line drawn from the nine-twentieth part of the length of the flag and the horizontal line drawn from the midpoint of the width of the flag. That is, the center of the circle is the point of intersection of the straight line drawn at the end point of the left side of the twenty-ninth of the length of the flag and the width drawn along the middle. The green background of the flag will be Prussian Brilliant Green H-2RS50 parts per thousand and the red circular part will be Prussian Brilliant Orange H-2RS60 parts per thousand