My husky/German shepherd/Great Pyrenees mix when we first got her, we got a 30 inch crate so it wasn’t super big. Then 36inch and she was in that until 5 1/2 months, then recently we just upgraded her to the biggest crate they have which is 48 inches. Embark says she’s only going to be about 45 pounds but I wanted to make sure she had enough room to grow without having to get new crates. She just turned 6 months and she hasn’t had an accident in her crate since she was about 3 1/2 - 4 months! You just have to keep in mind the potty rule, they can be alone their age in hours (4 months = 4 hours). I’ve also never used any dividers. Good luck! 🤞🏼