What size sauna should you buy?

Ignore the person-count label for a moment. Actual bench space tells you far more about comfort.

For one regular user

A compact one-person cabin may be efficient and easier to place, but compare shoulder room and seating posture carefully.

For couples

A two-person model should be judged by usable bench width and heater placement, not simply whether two bodies technically fit inside.

For families and guests

Once you reach three or more regular users, layout becomes as important as floor area. Look at multiple benches, door swing, foot room and whether everyone will be exposed evenly to the heat source.

Measure the route too

Delivery access, stairwells, doors and hallways can determine whether a modular cabin can reach the intended room. Ask about package dimensions before ordering.