I'm guessing 2 by the igloos. 2x4 is always reccomended but on the front page it says the minimum is 2x3 and i think you did a fabulous job! Oone point- For the pigloos you want to take off the stickers around the opening. I took the sticker off my igloo because I was a bit owrried about the sticky part of the sticker not being healthy.
I've seen a BUNCH of pics on the site because Im looking for ideas for cages before I buy my first guinea pig and I must say I think yours is the best I've seen so far (at least for what I'm looking for size-wise n style) due to the size, color and neatness. Great job!
Also, I'm half korean so I can appreciate the Korean flag stickin out
I like this cage so calm,and peaceful.And could you have a closer few of this in another picture.And is that a ball in the middle of the pigloos? Plus keep up the good work! I love all your ideas.