Started out hunting out of the standard 4x4 blinds.
Got my first lease as an adult and built myself a 4x6. Works great for one person and a good chair but 2 people it can be tight.

Eventually my wife started hunting and wanted a big roomy blind so I built a 5x8 for her because she liked to stretch out on early mornings and nap until she could see well enough to start hunting.

That 5x8 was the game changer. Plenty of room for two with nice chairs. After having our first child I decided to drop the 4x6 and built a 6x8.

6x8 is huge. The only real downside to it and the 5x8 is not being able to easily hunt out of either side window without scooting around. But it’s very quiet and solid and not to hard to do unless they’re a deer right on top of you.