There are many different types of RFID tags. The main difference is whether or not there is an external power source. For apparel tags and stickers, there is no power source, for that reason, the chips are small and able to be inserted in the tags and stickers.
RFID technology has been used for many years in items such as the key less entry to cars, toll road readers, credit cards, cell phones and Bluetooth devices and warehouses use the technology for logistics. RFID can be used in telling the condition and location of an object.