I ordered the 63 inch diameter swimming pool for our one and a half year old, 80 lb yellow lab. So far after 4 times of use the pool has withstood his rambunctious puppy play without any problems. The traction on the bottom of the pool is sufficient to prevent slips and falls. The structure of the pool becomes stronger as you fill it with water, yet it is flexible enough to fold and store easily when empty. The drain is a must and works well to quickly drain the pool. I would recommend this pool for either small children or dogs.