When Prince George arrived on the July 22, 2013 at 4.24pm he weighed 3.8kg.
Born on May 2, 2015, she wasn't far behind him weighing 3.7kg.
Louis was the biggest of the Cambridges at 3.83kg on April 23, 2018.
Prince Harry weighed 3.12kg when he was born on September 15, 1984.
Prince William was lighter than all of his children when he was born on June 21, 1982. He hit 3.22kg on the scales.
The daughter of Zara and Mike Tindall weighed 3.5kg when she was born on January 17, 2014.
Born on June 18, 2018, she weighed in at an impressive 4.17kg.