Photo: abc.net.au

It is believed a woman enter a Lonsdale Street store between 12.40pm and 12.55pm on 9 March.

Investigators have been told the woman picked out a dark green top before walking into the change rooms and placing it into her bag.

She then left the store without paying.

Investigators have released an image of a woman they believe may be able to assist with enquiries.

The woman is described as Caucasian and about 20 years old with long brown hair.

She was wearing three-quarter length grey tights and a purple singlet.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential crime report at www.crimestoppersvic.com.au.