Choose a size on the drop-down menu that is the closest one to your pool (it has to be bigger than your pool in order to cover it all).
Select whether your pool has steps or no.
Then enter the actual size of your pool below.
This pool shape will require A-B measurements.
Here is an explanation on what you will have to do. If you do not have any obstructions withing 18″ of the edge of your pool please ignore this part. We will get the A-B measurements from you after you have ordered the safety cover.