yes, unless of course you need a lid on the cage, then you may need a few more grids.

My cage is a 2 grid x 4 grid bottom level, with a 1 grid x 2 grid upper level at one end. That took 20 grids pieces, and I used 2 grids to make the ramp, and have 2 left over. Since I plan on another 1x2 upper level at the other end, I'll need 8 more grids... that means another box and more coroplast, so my piggies may have a third level added on to "Hog Heaven" to use some of the extra.

I would really like to give them a 2x5 or 2x6, but I would have to move them to the basement for that, and they love the morning sunshine and the abundance of daylight where they're at.