Hi,
The water from seat height to water line height is around 24-25 in. The water capacity is around 90 gallons (unoccupied) and 55-75 gallons (occupied). Our Malibu Walk-In Tub is 30" W x 52" L x 43" H. The seat size is 20 3/4" W x 17" H x 14 1/4" L. You have the option of choosing the jetting, whirlpool massage, air massage, hydro+air massage, microbubble, hydro+microbubble, or air+microbubble. Also, the 5-piece thermostatic control valve faucet (shown in image) or 5-piece fast fill faucet for faster fill time. We are the manufacture of Ella's Walk-In Tub located in Chicago.