Directions:
1) Begin by measuring all four sides of the existing pan. The longest length is the “length,” the longest width is the “width.”
2) Choose an orientation. To do this, choose one short side to become the “right” of the pan, and one long side to become the “bottom” of the pan. You will take all your measurements from these two sides.
3) Measure from the “right” of the pan to the edge of the hole. This is measurement “A.” Measure from the “bottom” of the pan to the edge of the hole. This is measurement “B”. Measure the width of the hole. This is measurement “D.” (If you cannot measure the width, use a seamstress tape to measure around the hole and divide it by 3.14 to get “D”) Round "D" to the next half inch before providing the measurement. It's better for "D" to be slightly too large than too small.