Measuring ahead

I know ultrasounds are estimates and not 1000% accurate. But at my 29 week ultrasound baby boys legs measured 34 weeks and overall measurements were 31 weeks. Also weight estimate was 3lbs 14oz and tech said if I end up full term baby would most definitely be over 8.5lbs. My husband and I are tall, but my girls were not over 7lb babies and average length. Any ladies with experience in babies measuring ahead? Just wondering how accurate with ended up for you