If you have a smaller, female Rottweiler, you may be able to purchase a 42-inch or 48-inch cage, as these dogs usually weigh in at 77-100 lbs. For large, male dogs which can weigh up to 130lbs, we recommend a 54-inch cage. To make sure you get the right size for your Rottweiler, we recommend measuring it with the following 3 steps.