A khiyar (option) that comes into effect if a person buys an item in barter for items placed together as a bulk quantity (such as the case of a closed container). The seller of such items doesn’t know the quantity or type of the items. In this case, the seller has the option after opening the container (or whatever means of storage) and checking its contents to select between concluding or terminating the sale transaction.

The term “khiyar al-kammiyyah” was originally coined by the Hanafis. It differs from khiyar al-ru’yah in that the latter doesn’t apply when the yet-to-be-seen item is money.

Khiyar al-kammiyyah (خيار الكمية) is an Arabic term that translates as quantity option.