This is my 3rd pool build, and it is the smallest of the 3. My yard is a bit smaller than the other 2 but for some reason the wife and I got stuck on a design idea and a few $$$$ and decided not to make the pool as big as we should have. If you are planning on building a pool, do not allow a few $$$$ to influence your decision regarding size. Ours is a geometric that is 14W and 17W x 32. It is 3 feet to 5.6 ft. WAY to shallow. The wife wanted to play volleyball! A major regret. Our old pool was 40 feet by 20, and that is a HUGE difference. My kids dont swim in this pool because the surface is cutting their toes, it is also like bathing in a hot bath and it is just small. We didnt have any fancy water features, we just failed to build it bigger thinking we would be spending to much money. If we had that to do again we would have gladly spent another 10k to make it bigger. SO moral of my story, do not build a pool that is too small, or too shallow, if you have a budget, dump the water feature, fountain, fire pit blah blah and build it big!
I have a really big bird bath in my yard.