You can hang it on your bag.
Small cards usually refer to smaller ID cards, bank cards or other similar cards. The feasibility of a small card on a bag depends on the design and structure of the bag. Many bags are equipped with card slots or card holders, which are specially used to store small cards. You can insert the small card into the card slot of the bag or fix it on the bag with a clip. This is convenient for carrying small cards and taking them out for use. However, the size and capacity of the card slot or card holder of the bag may be limited, so when hanging a small card on the bag, it is necessary to ensure that the card is safely fixed to avoid loss or damage.