Needless to say, dog crates are available in a range of sizes, and you should select a crate depending on the breed, the size, and the physical age of your dog. Please remember that a crate is meant for your dog to sleep, relax and feel safe and comfortable in it.  So, you can’t buy a crate that is too small for them. Your dog should at least have enough space to turn around, stand up, and lie down comfortably while it is inside the crate.