However, it was by no means the largest grown this season.
Roger and Julie Corbett of Havelock North produced a 316g feijoa, and there have been reports of a 284g fruit in the Bay of the Plenty.
Tim Harper, president of the New Zealand Feijoa Growers Association, said while it had been a "pretty solid year" for the fruit, giant feijoas were due to natural variation.
And good news for those whose trees produce giant fruit; size does not necessarily affect the taste.
"If it's grown with the right nutrients, then all of them taste great."
A bit of water and fertiliser was all that was needed to help a tree along with a bumper crop, he said.
Meanwhile, Ms Scales said though she was happy with her harvest and that she and her son enjoy eating the fruit, other members of her family weren't feijoa fans.
"That's the way it seems to be with feijoas, you either love them or hate them."