I am looking for a mesh cover for a pool which is rectangular, 24 ft by 12 ft by 56 inches deep.
The a/g mesh pool covers we carry are meant for round and oval pools. You may be able to use an oversized oval cover to fit your square pool but it would create a bunch of excess material overhang. If you search for rectangle pool covers on Google, it should be relatively easy to find from other online vendors.