I have two hounds and two crates. My adult hounds' crates are 36" long by 21" wide by 23" high. Lots of room--more than they need. I could easily go with a crate one size down, and am planning to do so next time I buy crates. Do check into the crates with dividers so you can expand them as needed. One crate per hound will save you money in the long run--they'll each need one eventually.