Swim spas come in various sizes, typically ranging from 12 to 21 feet in length, 7 to 8 feet in width, and 4 to 6 feet in depth. At Great Bay, we offer Hydropool Swim Spas. They come in various sizes including 14’, 17’, and 19’. Most (if not all) units are 53” tall. Which offers just under 4 feet of water depth. All units are 7 foot 9 inches wide. Hydropool engineers their swim spas to have the largest open swim areas compared to other brands.