The family of Robert Ellis, a businessman with New Zealand links who was murdered in Bali, is in shock at the 12-year sentence handed down to his wife.

45-year-old Noor Ellis ordered a hit on her husband, and was expected to go to prison for 15 years as prosecutors had recommended, but the court has handed down a 12-year term in recognition of her remorse and "prolonged mental pressure".

The body of Mr Ellis was found wrapped in plastic in a rice field last October.

Perth students John and Peter Ellis had prepared themselves for their mother Noor Ellis, to go to prison for 15 years as prosecutors had recommended, for planning the murder of Robert Ellis. But on Wednesday, the court handed down a 12-year term in recognition of her remorse and "prolonged mental pressure".

She could have received a maximum penalty of death.

Peter Ellis told reporters his father's death had left a huge hole in his life and John's, as well as for Mr Ellis' older children Kelvin and Christina.

"We as a family are extremely disappointed by the outcome of 12 years," he said.

"We would have expected a sentence of at least 20 for the brutal, premeditated murder of our father.

"For the verdict to be a sentence of only 12 years is unjust not only for us as a family, but Indonesia in general."

The prosecutor said he was considering an appeal.

Ellis has family in New Zealand funeral was held here.