A dog at 11 months old is usually done growing. He may or may not fill out more with muscle, so maybe like 2 or 3 more pounds. So your dog should look like an adult dog now, but he most likely wont act like one for at least a few more months.
My Blue Pit Bull Dog Is Almost 11 Months Old And He Weighs 76 Pounds How Much Bigger Do You Think He Will Get?