The size of the pool depends on the size of your property and the number of kids you have. The rule of thumb is 1 to 2 feet of depth for every 100 square feet of pool surface area. You should also take into consideration the outside temperature so that you don’t have to spend too much money on heating the water. We have pool design plans available in case you’re building a pool! Our site offers splashy advice on creating unique swimming pool designs.