A lot depends on your intended use of it .
If you plan to bow hunt you'll need a roomier blind with a higher ceiling or a zip open roof panel . If all you do is gun hunt you can get by with a shorter one .

I have several of them:
Ameristep Outhouse - gun only , plenty of windows , definitely one man only .
Guide Gear - polyhedral style , room for two with guns , one with bow , has ZO roof panel .
Ameristep turkey blind(2 sizes) - open top , very light , one man only .

There are plenty of different styles and sizes out there , look around until you find one that suits your particular situation .