Oh of coarse you would but I like to make all of my enclosures a little bigger than they need to be for my reptiles. Just makes for more content lizards
I had my 2 together as juveniles but recently had to seperate them because they turned out they where male and female if your getting to unsexed defently jst keep them seperate but a 4x2x2 is defently big enough for even a trio but be aware once there of sexually maturity they will be conflict if you keep them together I learned the hard way
I had a pair together in a 3' for nearly a year til the first signs of agro and then split a 4'x2' into 2 so they get 2'x2'x2' each until mating time comes around and then they will get the whole 4'.I am building another 1 the same for my other pygmies