There are more jeans in the stores than consumers are willing to buy, at the given price. This means that there is a excess of jeans.
Here is a quick explanation:
Economically speaking, this excess is explained as an imbalance in the demand and supply of jeans. What does that mean? It means that the supply of jeans, that is, the amount of jeans being offered to people, is higher than the demand for these jeans, that is, it is higher than the consumer demand for these jeans and this provokes the excess product at the factory or store.