It probably isn't where Kate Middleton will be buying her gown, but Costco is hoping for great success with bridal gown sales.

The cash-and-carry has joined forces with top bridal designer Kirstie Kelly to sell six exclusive dresses at around 40 per cent of their usual retail price.

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The handmade gowns are being showcased in a series of four-day trunk shows in one-off events around the country.

They range in price from $699 to $1,399 with dress sizes ranging from size 2 to 24.

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Brides-to-be can either book an appointment or walk in to the temporary Costco concessions during the events, which are advertised on the company website.

Consultants will be on-hand to advise and answer any style questions, and the dresses can be taken home the same day - though, the designer added, they are likely to want to get it tailored to ensure the best possible fit.

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