When making your own DIY guinea pig cage, a plastic cage liner is a must! Available in two sizes: 3x2-panel or 4x2-panel, and can fit a wire cage in the same size. Easy to assemble and makes cleaning up after playtime a breeze! Midlee Guinea Pig Cage Panels are sold separately and are approx. 13.5"x13.5" each. - Assembled dimensions are 41" x 27"