After using a couple different commercial tree stands and finding none of them "comfortable" I started building my own.
This was a free standing one that I used for a few years. There was no suitable trees available at that location which was an overgrown field that was once used for cattle. It was 6 feet wide and 4 feet deep at the center. It stood on four (legs) 4"x4" posts with appropriate cross braces.
When I moved locations there was a nice three trunked evergreen so I built "around" it - the front two trunks go right up through the roof. This one is 5' wide and almost 7' deep. No inside pics but I have a "coffee table", an office chair (that swivels and reclines of course) and a propane tent heater to keep the toes and fingers warm
The may seem a little more (open) than most but that's because they are used predominately for crossbow hunting (over a 90 day season) so need room for the limbs - only see a rifle if I have a tag left after the early bow.