How big would you guess he'll be??

Kortney
My baby boy was born February 26th at 3:00pm (the picture on the left was the day after we got home from the hospital). He was 8lbs 6oz and 21inches long. He is now 11 weeks old (the picture on the right was take. 4 days ago and he will be 3 months old in 9 days)... He is now 16lbs and 26inches long (he may be bigger by now that was just what he measured a week and a half ago)!!! At his 2 month check up the dr said he looked like a 4 month old and now he's fitting in 6-9 month clothing AT NOT EVEN 3 MONTHS OLD!!!! How many of y'all have babies growing this fast?? Any idea how big he might be? My husband is 6'3 and I'm 5'8 so we're not short by any means but I have a feeling he's going to be even bigger than his daddy ❤️