Ulla Popken generally aims to restock popular items based on customer demand. The frequency of restocking can vary depending on the specific item and its popularity. For many popular styles, restocks may occur on a weekly or bi-weekly basis. However, some items may take longer to replenish due to factors such as sourcing materials, production timelines, or seasonal availability. It is advisable for customers to regularly check the website for updates on restocked items, as well as new arrivals. If a particular item is sold out, there may also be an option to sign up for notifications when it becomes available again. For precise information about specific items, visiting the current web page is recommended, as it may provide updates on restocking schedules.