From 10am until 2pm, the Thrift Shop Clothing Market will feature a host of stallholders selling second-hand fashion items from numerous eras.

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The Greens on William manager Rebecca Mathie said the market will be a unique opportunity for stallholders to convert their trash into someone else's treasure.

"We're expecting around 20 stalls showcasing everything from clothing to shoes and accessories, ranging from new to vintage," Ms Mathie said.

"Not only will the event allow stallholders to cash in on their unwanted wares and shoppers to purchase some hidden treasures, but it will also reduce the amount of clothing ending up in landfill."

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Australian Bureau of Statistics data indicates around 501 million kilograms of clothing end up in landfill each year, amounting to approximately 20 kilograms per person.

Ms Mathie said there's a growing demand for sustainable shopping locally.

"This event has proven popular in the past among people looking for unique items of clothing they potentially wouldn't be able to find anywhere else," she said.

"We expect a desirable range of items will be available so I definitely recommend getting in early to take advantage of the wider range."

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Entry will be via gold coin donation, with all proceeds going towards the local Animal Welfare League branch.

For more information or to purchase a stall space, visit The Greens on William Facebook page.