While a few inches might not seem like it makes much of a difference, it can have big implications for the use of your new spa. You have to see how the size of the spa will affect the area around it. How much free space will you have between the spa and the walls so that you can enter and exit comfortably and safely, and if possible from several sides of the spa. Also consider enough space to maintain your hot tub.
In addition to figuring out how many seats you'll want, also think about what kind of seats you'll prefer. Many hot tub models come with a lounge seat that places your body in a reclining position.
Many people like the feeling of being able to stretch out in their hot tub, however, you have to keep in mind that they usually take up more space than regular spas without the lounge seat. So you have to decide if you prefer to maximize the number of seats or if you prefer to have multiple seating options in your spa.
The depth of your spa is another important factor to consider when looking for the perfect spa for you. Seat depths can vary, providing a more or less deep water level. In these cases, it is important to think about who will use the hot tub more often.