‘She’s a mini sumo wrestler’: Australian woman gives birth to nearly 6kg babyStuff ANNA WARR/ILLAWARRA MERCURYNewborn Remi Frances Millar weighed in at 5.88kg – or 12.9lb. The average birth weight of babies in Australia is 3.3kg – or 7.2lb. Related The BFD Staff A contribution from The BFD staff. More by The BFD Staff