The size and depth of the pool you select should be based on how you want to use the pool. If you just want to get in a cool off then a smaller pool will be sufficient. If you like to entertain large groups of people or want to be able to swim laps then you will need a larger pool.
The term Play Pool refers not to the size of the pool but the depth of the pool. A typical Play Pool is 3’ in the shallow end and 5’ in the deepest part of the pool. A Diving Pool will be 8’ to 10’ deep in the deepest end. Pools are measure by perimeter and surface area. For example: A small pool would be 15’ x 25’ would have a perimeter of 80 ft, a surface area of 375 sq ft and approximately 8,000 gallons based on 3’x4’x5’ depth.