what is the minimal order quantity ?

No minimal order quantity limite. Welcome to place large quantity order,and you can order only a few samples to check the quality. For wholesale order,you can get discount up to 20%. For the shipping cost, as the first 0.5kg of the package is expensive, so, the more quantity is , the cheaper shipping cost for each items will be.  If you order a few items,the shipping cost for each items will be high.