When deciding on shape and size understanding the primary users of the pool is helpful. Will swimmers want to relax? If so, a shallower pool is preferred possibly with a tanning ledge and benches. Will swimmers want to do laps? If you have someone who wants to swim laps we recommend a pool with an open swim lane and be over 30 feet in length. Will swimmers want to dive or jump in for more active play? If so, you will want a pool that is at least five feet deep for jumping in and eight feet deep for diving. Are your swimmers into sports? Playing volleyball and basketball in the pool can be great fun and having a shallow area for this is usually preferred.