You could be sitting on a fashion fortune. Levi’s owners are checking the tags of their jeans after it was revealed that some of the company’s vintage garments are worth a whopping $33,000.

Each year, Levi's sells over 1.25 billion pairs of blue jeans, with most costing between $30 and $60, but it turns out there are some out there worth well over 100 times that amount, and there is an easy way to tell if you have one of them.