I used a crate that size for my mini but she was a shorter mini. At the time we got her crate there were fewer choices and now there are so many.
I saw someone at a local petco being allowed to "try" them out by letting their dog get in the crates. But I do not know if that is standard policy or just a really nice worker being helpful.
But I have found a website that might help, it seems to have all kinds of info on dog crates and sizes. Here is a link: Dog Crate Size Guide | Dog Crate Sizes
I just glanced around but it seemed fairly comprehensive.
I ended up getting a larger size for my baby that I kept upstairs. Of course the only time my baby used it was during the day as she spent her nights in my bed. But it was her "haven". She loved her crate and knew it was hers and she didn't have to share.
Good luck finding what you both love.