The 19-year-old Sydney model and law student - who took top honours at Flemington on Melbourne Cup Day - said attention to detail and a polished finish were vital.
"Style and originality, appropriateness of outfit, accessories - how matched and appropriately women have put their outfit together to transcend into one complete look - and grooming and deportment are really important."
This year she expected to see both off-the-shoulder dresses and statement sleeves, full skirts, geometric prints and monochrome colouring.
She advised fashionistas to keep their hems long, and shoulders back, avoid short dresses and make sure heels were appropriate for the grass.
"You have thought about your outfit maybe for weeks, maybe for months, and you have just got to back yourself - just like the horses. Smile, put your shoulders back and be proud of what you're wearing."
Lindauer Raceday Ambassador Colin Mathura-Jeffree encouraged men to join in the fashion events, which include Cup Couture on Wednesday, Alexandra Park's Scenic Hotel Group Fashion Competition on Friday and the Diamond Darling competition on Saturday week.
"If you enter Fashion in the Field it's in the small things like your socks or an amazing brooch you might wear ... or a ring, something that shows a bit of flourish."
Visit www.ellerslie.co.nz and www.alexandrapark.co.nz for full details and to register for the events.
Expert tips
Chloe
* Keep your hemline long - on or below the knees.
* Keep hair and makeup classic.
* Practise walking in your heels.
* Wear heel stoppers to prevent stilettos sinking into the grass.
* Make sure hang tags are tucked in and lipstick is off your teeth.
* Keep sewing kit, plasters, Panadol and a snack in clutch.
Colin
* Make sure your suit is fitted, structured and tailored.
* Polish your shoes.
* If you're going sans tie, tuck your collar in - it's not Saturday Night Fever.
* Don't forget pocket squares and hats.