At the Auckland store in Mt Eden Rd yesterday, manager Vira Tavioni was busy taking inquiries from all over the world after Kate's appearance in the dress, which retails for $295.
"We're making a whole new bunch of those dresses now because everyone wants a dress like hers."
The label is primarily based in Rarotonga, where Ms Tavioni's sister Ellena is the head designer and where all the label's pieces are made and hand-printed.
A few weeks ago a Solomon Islands official called into the Rarotongan store to purchase specially made dresses for children who would greet the Duke and Duchess on their arrival in the Solomon Islands this week.
When the official mentioned they also wanted to buy traditional dress for the royal couple, Ellena Tavioni declined payment and insisted they were to be a gift.
Vira Tavioni said staff were excited and humbled to see the Duchess in their gear.
"She is so beautiful and the dress suits her.
"It's unbelievable. We're a small Pacific label and suddenly Kate wears one of our dresses and this happens."