The size of the enclosures is 4ft x 4ft x 4.5ft, the right size provides ample space for your pets to rest and play in a friendly and safe environment. If you want more space, you can also connect more dog crates together. PawGiant dog cage is surface treated with epoxy coating to prolong the service life of the metal and effectively improve the ability of anti-rust, anti-corrosion and anti-fading. There is no need to worry about rust in the dog cage in extreme weather conditions. The metal surface is treated to prevent sharp edges that could harm your pet.