What a sweetie!!!! I loved my ROttie so much I miss him! We just got a couple of puppies a week ago, 7 weeks old, Black lab/springer spaniel crosses and they're already getting pretty big too! People think all puppies are small but it's definitely relative!!
(Btw, enjoy your Rottweiler, they are incredible dogs to train. Just remember they tend to have very sensitive digestive systems and to keep an eye out for things before they become an issue. Do some breed research Rotties have a few medical problems that are common to the breed. Be informed so you can keep your precious pup safe always!)