hope my math is right here a 2X7 is 19 sq. feet roughly and a 2X2 is 5.4 sq feet roughly....which gives them about 24 sq. feet total to romp around in....The home page listing shows the minimum for 3 piggies to be 10.5 sq feet so I am assuming 21 sq. feet for 6 is the minimum and the preffered is listed as 13.5 for 3 so I am assuming that means 27 sq. ft or 6...Though by looking at the progression listed it seems that it says the minimum for 6 is actually 19 sq. feet and the preffered is 22 sq feet so you seem to be just fine if I did all the math right
Don't tempt me I already have an entire bedroom that they have access to to 24/7 from there cage which is a 4X5 with a 2X4 top though I set the top on the floor and fill it full of hay for them. I even added a 3X3 wing to the cage and a door that is always open so they can access the entire room anytime they want.