The business started selling at a fair and grew very slowly until it was decided to purchase some machinery and tools and the product became "more professional", she said.
Production was later moved to premises in Romania where 50 people were now employed making shoes. It had grown into a family business and the couple's son, Jesper Glerup Kristensen, was now involved.
Mrs Glerup Kristensen "never ever" dreamed the business would develop into such a large operation. Rather, the couple thought making a few shoes would give them "a little extra money".
They used wool from Gotland sheep, a breed which was first established on the Swedish island of Gotland by the Vikings with Karakul and Romanov sheep brought back from expeditions into Russia and crossed with the native landrace sheep.
It was necessary to mix the Gotland fibre with another kind of wool and, in the beginning, Ms Glerup sourced that wool from England.
Sometimes she got the wool she wanted but at other times it was not the correct micron. As the business grew, they tired of the varying quality.
Now sourcing the wool from New Zealand, they had consistent quality and it was "very good" for the business, she said.
Ten percent of Gotland wool was still used and they knew all the owners of those sheep personally.
It was good to know that NZM had contact with suppliers "so we know everything is good around the sheep", she said.
During their visit, the 2018 supply order was locked in and 120 tonnes a year was being supplied. Mrs Glerup Kristensen expected that volume would continue to grow as the business did.
The couple had enjoyed seeing such large farms, as the biggest number of sheep on a Danish farm was about 110.
Landcorp chief executive Steven Carden said the relationship with Glerups was exactly the sort of thing Landcorp was trying to achieve through its Pamu strategy, which involved entering supply chains for top quality products.
"It's great that they value the way that we farm and, of course, the contract provides certainty around supply and price for both of us," Mr Carden said.
It was the first deal Landcorp had made under Pamu and it also reflected the way the state-owned farming operation was joining partners to create those opportunities, he said.
"The fact that Nanny and Ove are out here and visiting the farms and our growers shows it actually is a relationship.
"It's not often a farmer gets the chance to meet their customers and see where their product ends up," he said.
