Sydney socialite to spend years in jail

Sydney socialite Kirsty Dayment has swapped the high life in Sydney's eastern suburbs for a prison cell for the next 39 months.

The 35-year-old was taken into custody last week ahead of her sentencing on Thursday after she pleaded guilty to supplying more than 85 grams of cocaine and knowingly taking part in the supply of MDMA with her former boyfriend Nicholas Riganias in 2015.

Judge Sarah Huggett sentenced her to a maximum five years and six months' jail with a minimum of three years and three months.

The failed fashion business owner moved in eastern suburbs circles where drug-taking "seems to be the social norm" and Dayment viewed the consumption of cocaine as a "fairly harmless recreational activity", the judge concluded.

Dayment and Riganias were arrested in July 2015 following a lengthy police investigation.

Police uncovered cocaine and more than 1.3kg of MDMA during a raid of Riganias' Coogee apartment in Sydney's east.

Riganias, 31, was sentenced to eight years with a non-parole period of four-and-a-half years.