Let's take a look at the specification sheet of one of our favorite models, the N-660-59FSWH-FM.
Overall Width: 1500mm/ 59.06''
Overall Length: 720mm/ 28.35''
Overall Height: 570mm/22.44''
Interior Bathtub Bottom Width: 1050mm/41.34''
Interior Bathtub Bottom Length: 500mm/19.69''
Interior Bathtub Height: 460mm/18.11''
Thickness of Deck: 30mm/1.18''
Overall Width To Drain: 750mm/ 29.53''
Overall Length to Drain: 360mm/ 14.17''